"United States Census, 1940", database with images, FamilySearch (ark:/61903/1:1:K97T-GVX : Sat Mar 11 08:23:56 UTC 2023), Entry for Vernon Duncan and Martha Duncan, 1940.
"United States 1950 Census", database, FamilySearch (ark:/61903/1:1:6XGQ-T8PL : Sat Mar 25 02:41:33 UTC 2023), Entry for Vernon L Duncan and Martha E Duncan, 9 April 1950.
Sources
↑ *"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M26X-QFF : accessed 21 May 2023), Vernon Duncan in household of Robert Duncan, South Burgin, Mercer, Kentucky, United States; citing enumeration district (ED) ED 93, sheet 8B, family 123, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 495; FHL microfilm 1,374,508.
Robert (1878); Annie ((1885) Children: Robert (1907) and Vernon (1910)
↑ "California, County Marriages, 1850-1953", database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:K8FR-FYB : 17 August 2022), Vernon Lee Duncan in entry for Roger Bradley Neal and Patsy Louise Duncan, 1949.
↑ "United States, Social Security Numerical Identification Files (NUMIDENT), 1936-2007", database, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:6K46-CYY1 : 11 February 2023), Vernon L Duncan in entry for Robert Lee Duncan, .