"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MKPQ-CX1 : accessed 21 August 2015), Peter Naninga, Keener, Jasper, Indiana, United States; citing enumeration district (ED) 21, sheet 5B, family 100, NARA microfilm publication T624 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,374,370.