Willson, Richard Eugene. comp. The Willson Family 1672-1979 Ottawa, IL:[s.n.],1979. Print. This edition incorporates 2 previous volumes which are available from Hathi Trust online. (Supplement 84)
"California Birth Index, 1905-1995," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:VG3Q-F4D : 27 November 2014), Robert Michael Alvord, 23 Oct 1943; citing Los Angeles, California, United States, Department of Health Services, Vital Statistics Department, Sacramento.
"United States Social Security Death Index," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:JTFX-P3Y : 20 May 2014), Robert Michael Alvord, 28 Mar 2007; citing U.S. Social Security Administration, Death Master File, database (Alexandria, Virginia: National Technical Information Service, ongoing).
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