"United States Census, 1910," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/ML55-FK3 : accessed 2 February 2015), Jacob Vanduinen, Grand Rapids Ward 2, Kent, Michigan, United States; citing enumeration district (ED) 57, sheet 2A, family 26, NARA microfilm publication T624 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,374,669.