"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:V1L8-749 : accessed 19 August 2017), Yvonne King in household of Geo B King, Election Precinct 10, Calhoun, Alabama, United States; citing enumeration district (ED) 8-15, sheet 7A, line 4, family 110, 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 8.
"United States Social Security Death Index," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:JYGJ-Z2Z : 20 May 2014), Yvonne K Wilkens, 13 Jun 2003; citing U.S. Social Security Administration, Death Master File, database (Alexandria, Virginia: National Technical Information Service, ongoing).
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