"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MJ71-RR9 : accessed 6 May 2016), George Ohlenroth in household of George J Ohlenroth, Chicago Ward 35, Cook (Chicago), Illinois, United States; citing sheet 4B, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,820,356.
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