"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K7QG-DS5 : accessed 19 May 2018), Sylvester Schoonover in household of Harry Schoonover, Brooking Township, Jackson, Jackson, Missouri, United States; citing enumeration district (ED) 48-68, sheet 11A, line 35, family 212, 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 2116.
"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XHVP-ZSM : accessed 19 May 2018), Sylvester Schoonover in household of Harry Schoonover, Kansas City, Jackson, Missouri, United States; citing enumeration district (ED) ED 34, sheet 1A, line 12, family 3, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 1194; FHL microfilm 2,340,929
"United States Social Security Death Index," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:JGCS-SJS : 20 May 2014), Sylvester Schoonover, 26 Feb 2004; citing U.S. Social Security Administration, Death Master File, database (Alexandria, Virginia: National Technical Information Service, ongoing).
"United States Public Records, 1970-2009," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:KBMC-HGR : 23 May 2014), Sylvester Schoonover, Residence, Owens X Rds, Alabama, United States; a third party aggregator of publicly available information.
Statesville Record & Landmark, page A4, 2004, Feb 28
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