"United States Census, 1910," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MKP7-94X : accessed 16 March 2015), Gerben Kingma, Keener, Jasper, Indiana, United States; citing enumeration district (ED) 21, sheet 4B, family 83, NARA microfilm publication T624 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,374,370.