"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K4ZX-D85 : 15 March 2018), John F Key, Civil District 1, Obion, Tennessee, United States; citing enumeration district (ED) 66-1, sheet 8B, line 52, family 173, 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 3925.
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