977. Allen, Leroy, Pi Gamma Mu: 1932.
978. American Advertiser, Reardon, James W.: 1933.
979. American Airlines, Inc.: 1943-44.
980. American Bible Society: 1955.
981. American Export Airlines, Inc.: 1943.
982. American Federation of Labor: 1933.
983. American Federation of Labor: 1933.
984. American Federation of Labor: 1945.
985. American Friends of Captive Nations: 1956-57.
986. American Geographical Society: 1926.
987. American Geographical Society: 1930-32.
988. American Geographical Society: 1934.
989. American Geographical Society: 1935.
990. American Geographical Society: 1936.
991. American Geographical Society: 1938.
992. American Geographical Society: 1947-57.
993. American Geographical Society: 1957-63.
994. American Guernsey Cattle Club: 1936.
995. American Heart Association: 1948-57.
996. American Heritage Foundation: 1956-63.
997. American Legion: 1932-47.
998. American Library Service: 1952-56.
999. American Library Service: 1955.
1000. American Magazine: 1933-35.
1001. American Mercury: 1932.
1002. American Museum of Natural History: 1932-35.
1003. American Museum of Natural History: 1937.
1004. American Museum of Natural History: 1938.
1005. American Museum of Natural History: 1939.
1006. American Museum of Natural History: 1947-53.
1007. American Museum of Natural History, specimens for: 1936.
1008. American People's Encyclopedia Yearbook: 1953-54.
1009. American People's Encyclopedia Yearbook: 1956-57.
1010. American Philosophical Society: 1952-57.
1011. American Philosophical Society: 1957.
1012. American Philosophical Society, Dercum, Francis H.: 1930.
1013. American Polar Society: 1948-52.
1014. American Review of Soviet Medicine, chemicals and vitamins: 1946.
1015. American Transoceanic Company: 1930.
1016. American Weekly: 1955.
1017. American Writing Paper Company: 1948-49.
1018. Anderson, Milton H.: 1943-44.
1019. Anheuser-Busch Company, chemicals and vitamins: 1944-48.
1020. Animal Rescue League of Boston: 1947-55.
1021. Ansbacher, Stephan: 1942-46.
1022. Ansbacher, Stephan: 1946-55.
1023. Ansbacher, Stephan, Sanitary Corps Personnel: 1942.
1024. Antarctic Associates: 1956.
1025. Antarctic Associates: 1956.
1026. Apsey, Laurence: 1947-48.
1027. Arctic Fur Company: 1956.
1028. Arctic Institute Of North America: 1945-53.
1029. Arctic Institute of North America: 1945-53.
1030. Arctic, subcommittee on: 1945.
1031. Armour and Company: 1926.
1032. Armstrong, O.K.: 1937.
1033. Army - Navy merger: 1945-46.
1034. Army Pictorial Service: 1947-48.
1035. Arnold Baker's, Inc.: 1953-54.
1036. Arnold Baker's, Inc.: 1954.
1037. Arnold Baker's, Inc.: 1955.
1038. Arnold Baker's, Inc.: 1955-58.
1039. Arnold Baker's, Inc.: 1956.
1040. Arnold Baker's, Inc.: 1956.
1041. Arnold Baker's, Inc.: 1957.
1042. Arnold Baker's, Inc., film project: 1956-57.
1043. Arnold, Lester D.: 1928-57.
1044. Arnold, Lester D.: 1947-59.
1045. Arnold, Paul Dean: 1956-59.
1046. Arpee, Edward: 1950.