"United States Census, 1940," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/K4P6-8VD : accessed 15 February 2015), Gertrude Wyngarden in household of John Wyngarden, Zeeland, Zeeland City, Ottawa, Michigan, United States; citing enumeration district (ED) 70-47A, sheet 8B, family 155, NARA digital publication T627 (Washington, D.C.: National Archives and Records Administration, 2012), roll 1809.