"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:VY54-G4X : accessed 24 April 2018), W O Riggs, Police Jury Ward 7, Rapides, Louisiana, United States; citing enumeration district (ED) 40-41, sheet 16A, line 1, family 284, 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 1442.
"United States Social Security Death Index," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:JL8W-64X : 20 May 2014), William Riggs, Nov 1974; citing U.S. Social Security Administration, Death Master File, database (Alexandria, Virginia: National Technical Information Service, ongoing).
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