Bureau circular
United States. Federal Security Agency. Social Security Board
prepared by Division of Technical Training, Bureau of Public Assistance
United States. Federal Security Agency. Social Security Board 1942 Bureau circular no. 15
所蔵館2館
United States. Federal Security Agency. Social Security Board 1941 Bureau circular no. 11
所蔵館1館
prepared by Division of Technical Training, Bureau of Public Assistance, Social Security Board, Federal Security Agency
United States. Federal Security Agency. Social Security Board 1940 Bureau circular no. 6
所蔵館3館
prepared by Division of Standards and Procedures, Bureau of Public Assistance, Social Security Board
United States. Federal Security Agency. Social Security Board 1939 Bureau circular no. 8
