"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MWVT-GHY : 20 February 2021), Oscar Peterson in household of Johana Peterson, Hahnstown, Westmoreland, Pennsylvania, United States; citing enumeration district ED 120, sheet 278A, NARA microfilm publication T9 (Washington, D.C.: National Archives and Records Administration, n.d.), FHL microfilm 1,255,204.
"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M3MW-SQW : accessed 23 July 2021), Oscar Peterson in household of Andrew Post, Precinct 1 McKeesport city Ward 2, Allegheny, Pennsylvania, United States; citing enumeration district (ED) 419, sheet 9B, family 183, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,241,368.
"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:S5K2-RZM : accessed 23 July 2021), Thomas O Peterson, Precinct 09, Dade, Florida, United States; citing enumeration district (ED) ED 91, sheet 1A, line 7, family 2, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 311; FHL microfilm 2,340,046.
"United States Census, 1940," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:VTHZ-93F : 4 January 2021), Thomas Peterson, Election Precinct 23, Miami-Dade, Florida, United States; citing enumeration district (ED) 13-33, sheet 28A, line 2, family 590, 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 580.
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