"United States Census, 1910," Database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MK8J-Y28 : accessed 16 June 2015), Jacob Baar, Chicago Ward 34, Cook, Illinois, United States; citing enumeration district (ED) 1471, sheet 3A, family 58, NARA microfilm publication T624 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,374,294.