26 12 2286 https://www.globalhealthchronicles.org/files/original/2c0f7f57f80f70bc5fadc41074ecd64e.jpg 968ab0717f9f889cb4f47aecc0c0db87 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Polio Photographs A static visual representation. Examples of still images are: paintings, drawings, graphic designs, plans and maps. Recommended best practice is to assign the type "text" to images of textual materials. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource CDC BUILDING ONE Description An account of the resource A black and white photograph of the first building on Centers for Disease Control and Prevention's Clifton Road campus in Atlanta, Georgia. Source A related resource from which the described resource is derived Centers for Disease Control and Prevention Date A point or period of time associated with an event in the lifecycle of the resource ~1960s https://www.globalhealthchronicles.org/files/original/6eac87f389a8a99c30de932c5479b63f.pdf 4de6897c7ddd59d13c604367d5a62106 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Malaria Control: CDC Beginnings Description An account of the resource <div class="landing"> <p>In 1942, when the U.S. was mobilizing for the Second World War, the U. S. Public Health Service set up a program to protect the personnel of military bases in the Southeastern states from malaria. This disease had long been rampant in the area, and posed serious threats to the health of the military and civilian populations. The program known as Malaria Control in War Areas (MCWA) was created to carry out the work. The lack of space in Washington due to the war effort allowed the program to base its headquarters in Atlanta, Georgia, and closer to the work at hand. During the war years, the program was expanded to include the control of other communicable diseases. Because its work was so successful, a new organization was created around the nucleus of MCWA, the Communicable Disease Center (CDC). The date was July 1, 1946. This archive chronicles the agency’s early history from 1941-1951, including the contributions of local businessmen and Emory University. The buttons to the right will connect you to a searchable database of documents, oral histories, photographs and media. To conduct an advanced search, use the link in the blue navigation bar above. Use of this information is free, but please see <strong>“About this Site”</strong> for guidance on how to acknowledge the sources of the information used.</p> </div> Documents Government Records Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource CDC BULLETIN – April 1950 Description An account of the resource “CDC Bulletin,” a periodical bulletin of CDC activities for April 1950 featuring information about Typhus, rats, and fleas. Produced by the Federal Security Agency, U. S. Public Health Service, Communicable Disease Center. Source A related resource from which the described resource is derived The David J. Sencer CDC Museum at the U. S. Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, GA 30333 www.cdc.gov/museum Date A point or period of time associated with an event in the lifecycle of the resource April 1950 Identifier An unambiguous reference to the resource within a given context 2005.40.6.pdf https://www.globalhealthchronicles.org/files/original/0e18d61958f78899e064ba949ef737a9.pdf 8385cb7728387c098244497e580ff2e4 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Malaria Control: CDC Beginnings Description An account of the resource <div class="landing"> <p>In 1942, when the U.S. was mobilizing for the Second World War, the U. S. Public Health Service set up a program to protect the personnel of military bases in the Southeastern states from malaria. This disease had long been rampant in the area, and posed serious threats to the health of the military and civilian populations. The program known as Malaria Control in War Areas (MCWA) was created to carry out the work. The lack of space in Washington due to the war effort allowed the program to base its headquarters in Atlanta, Georgia, and closer to the work at hand. During the war years, the program was expanded to include the control of other communicable diseases. Because its work was so successful, a new organization was created around the nucleus of MCWA, the Communicable Disease Center (CDC). The date was July 1, 1946. This archive chronicles the agency’s early history from 1941-1951, including the contributions of local businessmen and Emory University. The buttons to the right will connect you to a searchable database of documents, oral histories, photographs and media. To conduct an advanced search, use the link in the blue navigation bar above. Use of this information is free, but please see <strong>“About this Site”</strong> for guidance on how to acknowledge the sources of the information used.</p> </div> Documents Government Records Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource CDC BULLETIN – April 1951 Description An account of the resource “CDC Bulletin,” a periodical bulletin of CDC activities for April 1951 featuring a Preliminary Report of Mosquito Flight Dispersal Studies with Radioisotopes in California, 1950. Produced by the Federal Security Agency, U. S. Public Health Service, Communicable Disease Center. Source A related resource from which the described resource is derived The David J. Sencer CDC Museum at the U. S. Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, GA 30333 www.cdc.gov/museum Date A point or period of time associated with an event in the lifecycle of the resource April 1951 Identifier An unambiguous reference to the resource within a given context 2003.43.26.pdf https://www.globalhealthchronicles.org/files/original/694ec28c44080ffc175bbbd849faf5e5.pdf db282ec06d59db1abb1ffa019515c963 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Malaria Control: CDC Beginnings Description An account of the resource <div class="landing"> <p>In 1942, when the U.S. was mobilizing for the Second World War, the U. S. Public Health Service set up a program to protect the personnel of military bases in the Southeastern states from malaria. This disease had long been rampant in the area, and posed serious threats to the health of the military and civilian populations. The program known as Malaria Control in War Areas (MCWA) was created to carry out the work. The lack of space in Washington due to the war effort allowed the program to base its headquarters in Atlanta, Georgia, and closer to the work at hand. During the war years, the program was expanded to include the control of other communicable diseases. Because its work was so successful, a new organization was created around the nucleus of MCWA, the Communicable Disease Center (CDC). The date was July 1, 1946. This archive chronicles the agency’s early history from 1941-1951, including the contributions of local businessmen and Emory University. The buttons to the right will connect you to a searchable database of documents, oral histories, photographs and media. To conduct an advanced search, use the link in the blue navigation bar above. Use of this information is free, but please see <strong>“About this Site”</strong> for guidance on how to acknowledge the sources of the information used.</p> </div> Documents Government Records Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource CDC BULLETIN – April-June 1947 Description An account of the resource “CDC Bulletin,” a periodical bulletin of CDC activities for April-June 1947 featuring a report on Hydrologic Investigations Related to Studies of “Anopheles” Bionomics. Produced by the Federal Security Agency, U. S. Public Health Service, Communicable Disease Center. Source A related resource from which the described resource is derived The David J. Sencer CDC Museum at the U. S. Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, GA 30333 www.cdc.gov/museum Date A point or period of time associated with an event in the lifecycle of the resource April - June 1947 Identifier An unambiguous reference to the resource within a given context 2003.043.06.pdf https://www.globalhealthchronicles.org/files/original/98613cfc560837a654db70cfcb6c8c81.pdf 19626174eb57ab5f3e8803c1c370fbc6 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Malaria Control: CDC Beginnings Description An account of the resource <div class="landing"> <p>In 1942, when the U.S. was mobilizing for the Second World War, the U. S. Public Health Service set up a program to protect the personnel of military bases in the Southeastern states from malaria. This disease had long been rampant in the area, and posed serious threats to the health of the military and civilian populations. The program known as Malaria Control in War Areas (MCWA) was created to carry out the work. The lack of space in Washington due to the war effort allowed the program to base its headquarters in Atlanta, Georgia, and closer to the work at hand. During the war years, the program was expanded to include the control of other communicable diseases. Because its work was so successful, a new organization was created around the nucleus of MCWA, the Communicable Disease Center (CDC). The date was July 1, 1946. This archive chronicles the agency’s early history from 1941-1951, including the contributions of local businessmen and Emory University. The buttons to the right will connect you to a searchable database of documents, oral histories, photographs and media. To conduct an advanced search, use the link in the blue navigation bar above. Use of this information is free, but please see <strong>“About this Site”</strong> for guidance on how to acknowledge the sources of the information used.</p> </div> Documents Government Records Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource CDC BULLETIN – April-June 1948 Description An account of the resource “CDC Bulletin,” a periodical bulletin of CDC activities from April-June 1948 featuring a report on a Blueprint for Malaria Eradication Across the United States. Produced by the Federal Security Agency, U. S. Public Health Service, Communicable Disease Center. Source A related resource from which the described resource is derived The David J. Sencer CDC Museum at the U. S. Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, GA 30333 www.cdc.gov/museum Date A point or period of time associated with an event in the lifecycle of the resource April - June 1948 Identifier An unambiguous reference to the resource within a given context 2003.043.03.pdf https://www.globalhealthchronicles.org/files/original/074a6ac9c65963f4e84d3f09211a4a98.pdf 17aadfd5c865efbc7f52d47d7684c31d Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Malaria Control: CDC Beginnings Description An account of the resource <div class="landing"> <p>In 1942, when the U.S. was mobilizing for the Second World War, the U. S. Public Health Service set up a program to protect the personnel of military bases in the Southeastern states from malaria. This disease had long been rampant in the area, and posed serious threats to the health of the military and civilian populations. The program known as Malaria Control in War Areas (MCWA) was created to carry out the work. The lack of space in Washington due to the war effort allowed the program to base its headquarters in Atlanta, Georgia, and closer to the work at hand. During the war years, the program was expanded to include the control of other communicable diseases. Because its work was so successful, a new organization was created around the nucleus of MCWA, the Communicable Disease Center (CDC). The date was July 1, 1946. This archive chronicles the agency’s early history from 1941-1951, including the contributions of local businessmen and Emory University. The buttons to the right will connect you to a searchable database of documents, oral histories, photographs and media. To conduct an advanced search, use the link in the blue navigation bar above. Use of this information is free, but please see <strong>“About this Site”</strong> for guidance on how to acknowledge the sources of the information used.</p> </div> Documents Government Records Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource CDC BULLETIN – April-June 1949 Description An account of the resource “CDC Bulletin,” a periodical bulletin of CDC activities from April-June 1949 featuring Laboratory Division: Functions and Objectives. Produced by the Federal Security Agency, U. S. Public Health Service, Communicable Disease Center. Source A related resource from which the described resource is derived The David J. Sencer CDC Museum at the U. S. Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, GA 30333 www.cdc.gov/museum Date A point or period of time associated with an event in the lifecycle of the resource April - June 1949 Identifier An unambiguous reference to the resource within a given context 2003.043.10.pdf https://www.globalhealthchronicles.org/files/original/503cbf0f82effc5d8bfa62b9e1ed4d73.pdf 1aa9e97e342cc3c28b9e46e80cbc9f90 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Malaria Control: CDC Beginnings Description An account of the resource <div class="landing"> <p>In 1942, when the U.S. was mobilizing for the Second World War, the U. S. Public Health Service set up a program to protect the personnel of military bases in the Southeastern states from malaria. This disease had long been rampant in the area, and posed serious threats to the health of the military and civilian populations. The program known as Malaria Control in War Areas (MCWA) was created to carry out the work. The lack of space in Washington due to the war effort allowed the program to base its headquarters in Atlanta, Georgia, and closer to the work at hand. During the war years, the program was expanded to include the control of other communicable diseases. Because its work was so successful, a new organization was created around the nucleus of MCWA, the Communicable Disease Center (CDC). The date was July 1, 1946. This archive chronicles the agency’s early history from 1941-1951, including the contributions of local businessmen and Emory University. The buttons to the right will connect you to a searchable database of documents, oral histories, photographs and media. To conduct an advanced search, use the link in the blue navigation bar above. Use of this information is free, but please see <strong>“About this Site”</strong> for guidance on how to acknowledge the sources of the information used.</p> </div> Documents Government Records Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource CDC BULLETIN – April-June 1949 (Reprint) Description An account of the resource “CDC Bulletin,” a periodical bulletin of CDC activities from April-June 1949 featuring a reprint of pages 1-27: Laboratory Division: Functions and Objectives. Produced by the Federal Security Agency, U. S. Public Health Service, Communicable Disease Center. Source A related resource from which the described resource is derived The David J. Sencer CDC Museum at the U. S. Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, GA 30333 www.cdc.gov/museum Date A point or period of time associated with an event in the lifecycle of the resource April - June 1949 Identifier An unambiguous reference to the resource within a given context 2007.022.4.1.pdf https://www.globalhealthchronicles.org/files/original/dce17262799b4ee3d9676d418f4a2f23.pdf ad94e77976cabb3a337de3f40864a2d2 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Malaria Control: CDC Beginnings Description An account of the resource <div class="landing"> <p>In 1942, when the U.S. was mobilizing for the Second World War, the U. S. Public Health Service set up a program to protect the personnel of military bases in the Southeastern states from malaria. This disease had long been rampant in the area, and posed serious threats to the health of the military and civilian populations. The program known as Malaria Control in War Areas (MCWA) was created to carry out the work. The lack of space in Washington due to the war effort allowed the program to base its headquarters in Atlanta, Georgia, and closer to the work at hand. During the war years, the program was expanded to include the control of other communicable diseases. Because its work was so successful, a new organization was created around the nucleus of MCWA, the Communicable Disease Center (CDC). The date was July 1, 1946. This archive chronicles the agency’s early history from 1941-1951, including the contributions of local businessmen and Emory University. The buttons to the right will connect you to a searchable database of documents, oral histories, photographs and media. To conduct an advanced search, use the link in the blue navigation bar above. Use of this information is free, but please see <strong>“About this Site”</strong> for guidance on how to acknowledge the sources of the information used.</p> </div> Documents Government Records Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource CDC BULLETIN – August 1950 Description An account of the resource “CDC Bulletin,” a periodical bulletin of CDC activities for August 1950 featuring information about rat-borne diseases. Produced by the Federal Security Agency, U. S. Public Health Service, Communicable Disease Center. Source A related resource from which the described resource is derived The David J. Sencer CDC Museum at the U. S. Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, GA 30333 www.cdc.gov/museum Date A point or period of time associated with an event in the lifecycle of the resource August 1950 Identifier An unambiguous reference to the resource within a given context 2003.043.18.2.pdf https://www.globalhealthchronicles.org/files/original/a768c0d5ea8a60ab68089ad03ab93eb4.pdf a241111db28d490a1d3265349db274aa Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Malaria Control: CDC Beginnings Description An account of the resource <div class="landing"> <p>In 1942, when the U.S. was mobilizing for the Second World War, the U. S. Public Health Service set up a program to protect the personnel of military bases in the Southeastern states from malaria. This disease had long been rampant in the area, and posed serious threats to the health of the military and civilian populations. The program known as Malaria Control in War Areas (MCWA) was created to carry out the work. The lack of space in Washington due to the war effort allowed the program to base its headquarters in Atlanta, Georgia, and closer to the work at hand. During the war years, the program was expanded to include the control of other communicable diseases. Because its work was so successful, a new organization was created around the nucleus of MCWA, the Communicable Disease Center (CDC). The date was July 1, 1946. This archive chronicles the agency’s early history from 1941-1951, including the contributions of local businessmen and Emory University. The buttons to the right will connect you to a searchable database of documents, oral histories, photographs and media. To conduct an advanced search, use the link in the blue navigation bar above. Use of this information is free, but please see <strong>“About this Site”</strong> for guidance on how to acknowledge the sources of the information used.</p> </div> Documents Government Records Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource CDC BULLETIN – August 1951 Description An account of the resource “CDC Bulletin,” a periodical bulletin of CDC activities for August 1951 featuring Malaria Control in North Viet-Nam and Indo-China. Produced by the Federal Security Agency, U. S. Public Health Service, Communicable Disease Center. Source A related resource from which the described resource is derived The David J. Sencer CDC Museum at the U. S. Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, GA 30333 www.cdc.gov/museum Date A point or period of time associated with an event in the lifecycle of the resource August 1951 Identifier An unambiguous reference to the resource within a given context 2003.043.29.2.pdf https://www.globalhealthchronicles.org/files/original/7e5952865261e64a9b26018804463053.pdf 2d3290fe9e3c7dfc9652afcb958853f7 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Malaria Control: CDC Beginnings Description An account of the resource <div class="landing"> <p>In 1942, when the U.S. was mobilizing for the Second World War, the U. S. Public Health Service set up a program to protect the personnel of military bases in the Southeastern states from malaria. This disease had long been rampant in the area, and posed serious threats to the health of the military and civilian populations. The program known as Malaria Control in War Areas (MCWA) was created to carry out the work. The lack of space in Washington due to the war effort allowed the program to base its headquarters in Atlanta, Georgia, and closer to the work at hand. During the war years, the program was expanded to include the control of other communicable diseases. Because its work was so successful, a new organization was created around the nucleus of MCWA, the Communicable Disease Center (CDC). The date was July 1, 1946. This archive chronicles the agency’s early history from 1941-1951, including the contributions of local businessmen and Emory University. The buttons to the right will connect you to a searchable database of documents, oral histories, photographs and media. To conduct an advanced search, use the link in the blue navigation bar above. Use of this information is free, but please see <strong>“About this Site”</strong> for guidance on how to acknowledge the sources of the information used.</p> </div> Documents Government Records Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource CDC BULLETIN – December 1950 Description An account of the resource “CDC Bulletin,” a periodical bulletin of CDC activities for December 1950 featuring Center Highlights. Produced by the Federal Security Agency, U. S. Public Health Service, Communicable Disease Center. Source A related resource from which the described resource is derived The David J. Sencer CDC Museum at the U. S. Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, GA 30333 www.cdc.gov/museum Date A point or period of time associated with an event in the lifecycle of the resource December 1950 Identifier An unambiguous reference to the resource within a given context 2003.43.22.3.pdf https://www.globalhealthchronicles.org/files/original/2446270f2999fb5abd5a80678120b543.pdf 29c955f610f7ca2c4baf59b97316b543 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Malaria Control: CDC Beginnings Description An account of the resource <div class="landing"> <p>In 1942, when the U.S. was mobilizing for the Second World War, the U. S. Public Health Service set up a program to protect the personnel of military bases in the Southeastern states from malaria. This disease had long been rampant in the area, and posed serious threats to the health of the military and civilian populations. The program known as Malaria Control in War Areas (MCWA) was created to carry out the work. The lack of space in Washington due to the war effort allowed the program to base its headquarters in Atlanta, Georgia, and closer to the work at hand. During the war years, the program was expanded to include the control of other communicable diseases. Because its work was so successful, a new organization was created around the nucleus of MCWA, the Communicable Disease Center (CDC). The date was July 1, 1946. This archive chronicles the agency’s early history from 1941-1951, including the contributions of local businessmen and Emory University. The buttons to the right will connect you to a searchable database of documents, oral histories, photographs and media. To conduct an advanced search, use the link in the blue navigation bar above. Use of this information is free, but please see <strong>“About this Site”</strong> for guidance on how to acknowledge the sources of the information used.</p> </div> Documents Government Records Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource CDC BULLETIN – December 1951 Description An account of the resource “CDC Bulletin,” a periodical bulletin of CDC activities for December 1951 featuring Center Highlights. Produced by the Federal Security Agency, U. S. Public Health Service, Communicable Disease Center. Source A related resource from which the described resource is derived The David J. Sencer CDC Museum at the U. S. Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, GA 30333 www.cdc.gov/museum Date A point or period of time associated with an event in the lifecycle of the resource December 1951 Identifier An unambiguous reference to the resource within a given context 2003.043.33.1.pdf https://www.globalhealthchronicles.org/files/original/1015d1dc53a03100883334e40d7b266e.pdf 37ce860d6a01bbe099999a5c6563dc31 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Malaria Control: CDC Beginnings Description An account of the resource <div class="landing"> <p>In 1942, when the U.S. was mobilizing for the Second World War, the U. S. Public Health Service set up a program to protect the personnel of military bases in the Southeastern states from malaria. This disease had long been rampant in the area, and posed serious threats to the health of the military and civilian populations. The program known as Malaria Control in War Areas (MCWA) was created to carry out the work. The lack of space in Washington due to the war effort allowed the program to base its headquarters in Atlanta, Georgia, and closer to the work at hand. During the war years, the program was expanded to include the control of other communicable diseases. Because its work was so successful, a new organization was created around the nucleus of MCWA, the Communicable Disease Center (CDC). The date was July 1, 1946. This archive chronicles the agency’s early history from 1941-1951, including the contributions of local businessmen and Emory University. The buttons to the right will connect you to a searchable database of documents, oral histories, photographs and media. To conduct an advanced search, use the link in the blue navigation bar above. Use of this information is free, but please see <strong>“About this Site”</strong> for guidance on how to acknowledge the sources of the information used.</p> </div> Documents Government Records Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource CDC BULLETIN – February 1950 Description An account of the resource “CDC Bulletin,” a periodical bulletin of CDC activities for February 1950 featuring a report on Anthropod-borne Encephalitides. Source A related resource from which the described resource is derived The David J. Sencer CDC Museum at the U. S. Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, GA 30333 www.cdc.gov/museum Identifier An unambiguous reference to the resource within a given context 2003.043.14.pdf Date A point or period of time associated with an event in the lifecycle of the resource February 1950