1940 Ward 7, Chicago, Chicago City, Cook, Illinois, United States [3]
Sources
↑ "United States Social Security Death Index," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:JGCP-LMR : 19 May 2014), Ralph B Olson, 27 May 2001; citing U.S. Social Security Administration, Death Master File, database (Alexandria, Virginia: National Technical Information Service, ongoing).
↑ "United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XSTF-GPN : accessed 7 June 2017), Ralph Olson in household of Ralph Olson, Brookfield, Cook, Illinois, United States; citing enumeration district (ED) ED 2168, sheet 25A, line 45, family 307, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 502; FHL microfilm 2,340,237.
↑ "United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:KWYW-ZV9 : accessed 7 June 2017), Ralph Olson in household of Ralph Olson, Ward 7, Chicago, Chicago City, Cook, Illinois, United States; citing enumeration district (ED) 103-473, sheet 10B, line 45, family 231, Sixteenth Census of the United States, 1940, NARA digital publication T627. Records of the Bureau of the Census, 1790 - 2007, RG 29. Washington, D.C.: National Archives and Records Administration, 2012, roll 935.