"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K4P6-MQN : 14 March 2018), Charles Westover in household of Bert Westover, Coopersville, Polkton Township, Ottawa, Michigan, United States; citing enumeration district (ED) 70-36, sheet 7B, line 46, family 151, 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 1809.
* Find A Grave, database and images (https://www.findagrave.com : accessed 05 July 2019), memorial page for Del Shannon (30 Dec 1934–8 Feb 1990), Find A Grave Memorial no. 6562600, ; Maintained by Find A Grave Cremated, Ashes scattered. [This Memorial includes a good biography (not compared with Wikipedia).]