"Illinois, Cook County, Birth Certificates, 1871-1940," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:NQBF-YQ8 : accessed 6 May 2016), James Robert Ohlenroth, 09 Aug 1910; citing Chicago, Cook, Illinois, United States, reference/certificate 12638, Cook County Courthouse, Chicago; FHL microfilm 1,288,203.
"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MJ71-RR3 : accessed 6 May 2016), Robert 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.
"United States Census, 1930", database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XSGG-8CC : accessed 6 May 2016), Robert J Ohlenroth in entry for George J Ohlenroth, 1930.
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