Official 1940 census website 1940 Census Records from the U.S. National Archives and Records Administration 1940 Federal Population Census Videos, training videos for enumerators at the U.S. National Archives Selected Historical Decennial Census Population and Housing Counts from the U.S. Census Bureau Snow, Michael S. (opinion) "Why the huge interest in the 1940 Census?"
وبگاه رسمی سرشماری ۱۹۴۰ ایالات متحده آمریکا 1940 Census Records from the U.S. دفتر ملی بایگانی و مدارک آمریکا 1940 Federal Population Census Videos, training videos for enumerators at the U.S. National Archives Selected Historical Decennial Census Population and Housing Counts from the U.S. Census Bureau Snow, Michael S. (opinion) "Why the huge interest in the 1940 Census?"