"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MKK4-3PW : accessed 8 May 2019), Lytton R Williamson in household of Pressly Williamson, Fayetteville Ward 2, Washington, Arkansas, United States; citing enumeration district (ED) ED 143, sheet 20A, family 407, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 67; FHL microfilm 1,374,080.
"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M84F-9WP : accessed 8 May 2019), Roy Williamson in household of P B Williamson, Gallatin, Clay, Missouri, United States; citing ED 23, sheet 1A, line 34, family 9, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 913; FHL microfilm 1,820,913.
"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XHXV-LM1 : accessed 8 May 2019), Roy Williamson in household of Mollie Malone, North Kansas, Clay, Missouri, United States; citing enumeration district (ED) ED 10, sheet 10A, line 50, family 253, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 1183; FHL microfilm 2,340,918.
"United States Social Security Death Index," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:JYB7-SW1 : 20 May 2014), Roy Williamson, Sep 1977; citing U.S. Social Security Administration, Death Master File, database (Alexandria, Virginia: National Technical Information Service, ongoing).
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