↑ "United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:SP4G-ZGH : accessed 2 March 2020), Clifford Wilkinson in household of Anna Wilkinson, Knoxville, Knox, Tennessee, United States; citing enumeration district (ED) ED 54, sheet 4A, line 1, family 59, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 2259; FHL microfilm 2,341,993.
*"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K4CT-KMN : 29 July 2019), Clifford Wilkerson, Civil District 11, Knox, Tennessee, United States; citing enumeration district (ED) 47-30, sheet 10A, line 31, family 168, 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 3910.
"Tennessee Deaths, 1914-1966," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QKMS-9VYQ : 26 August 2019), James Clifford Wilkinson, 11 Jul 1959; Death, Knoxville, Knox, Tennessee, United States, Tennessee State Library and Archives, Nashville.