"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MK86-WT7 : accessed 23 August 2015), Jacob Borgman, Chicago Ward 32, Cook, Illinois, United States; citing enumeration district (ED) 1408, sheet 17A, family 354, NARA microfilm publication T624 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,374,292.