United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:KWBS-XDJ : accessed 23 July 2015), John Heemstra, Ward 16, Chicago, Chicago City, Cook, Illinois, United States; citing enumeration district (ED) 103-1087, sheet 12B, family 275, NARA digital publication T627 (Washington, D.C.: National Archives and Records Administration, 2012), roll 954.