"United States Public Records, 1970-2009," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:K1SG-Q14 : 23 May 2014), Mark C Hansen, Residence, Cupertino, California, United States; a third party aggregator of publicly available information.
"United States Social Security Death Index," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:V95J-66J : 20 May 2014), Mark Hansen, 23 May 2001; citing U.S. Social Security Administration, Death Master File, database (Alexandria, Virginia: National Technical Information Service, ongoing).
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