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"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K4X4-H5W : 24 January 2020), Arthur R Mckee, Andover Town, Essex, Massachusetts, United States; citing enumeration district (ED) 5-15, sheet 11B, line 67, family 299, 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 1577.