"United States Census, 1910," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:MK87-GFN : accessed 6 June 2022), Robert Dolan, Chicago, Cook, Illinois, United States; citing enumeration district (ED) ED 1293, sheet , family , NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll ; FHL microfilm .
"United States Census, 1930," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:XST5-4BZ : accessed 6 June 2022), Robert Dolan, Proviso, Cook, Illinois, United States; citing enumeration district (ED) ED 2308, sheet 20A, line 12, family 31, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 506; FHL microfilm 2,340,241.
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