"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:KWLZ-FBP : accessed 29 January 2017), Mary E Caldwell in household of Byron E Caldwell, Ward 3, Mansfield City, Madison Township, Richland, Ohio, United States; citing enumeration district (ED) 70-32, sheet 12A, line 31, family 270, Sixteenth Census of the United States, 1940, NARA digital publication T627. Records of the Bureau of the Census, 1790 - 2007, RG 29. Washington, D.C.: National Archives and Records Administration, 2012, roll 3135.
-----
Household Role Gender Age Birthplace
Byron E Caldwell Head M 25 Ohio
Mary E Caldwell Wife F 23 Ohio
Terry E Caldwell Son M 0 Ohio