United States Census, 1940," index and images, FamilySearch (https://familysearch.org/ark:/61903/1:1:KWBX-R7D : accessed 29 May 2015), Grace Dykstra in household of Larcas Dykstra, Ward 20, Chicago, Chicago City, Cook, Illinois, United States; citing enumeration district (ED) 103-1360, sheet 10B, family 204, NARA digital publication T627 (Washington, D.C.: National Archives and Records Administration, 2012), roll 962.