"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:VB38-WN8 : 27 July 2019), Bobby L Wren in household of Lee P Wren, Beat 5, Tishomingo, Mississippi, United States; citing enumeration district (ED) 71-18, sheet 5A, line 37, family 73, 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 2070.
"United States Social Security Death Index," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:JBCT-7YD : 20 May 2014), Bobby L Wren, 28 Apr 2006; citing U.S. Social Security Administration, Death Master File, database (Alexandria, Virginia: National Technical Information Service, ongoing).