"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MZ7S-3ZX : accessed 4 August 2015), Harry Helmus, Holland Ward 5, Ottawa, Michigan, United States; citing sheet 3A, family 46, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,820,792.