"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:KM93-K3K : accessed 1 December 2016), William Perkins in household of Lester E Perkins, York Town, York, Maine, United States; citing enumeration district (ED) 16-93, sheet 3B, line 80, family 65, 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 1497.
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