"California Death Index, 1940-1997," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:VPXQ-LDS : 26 November 2014), Gertrude Rose Kenefic, 14 Aug 1989; Department of Public Health Services, Sacramento
"United States Social Security Death Index," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:JKVR-XZ8 : 20 May 2014), Gertrude R Kenefic, 14 Aug 1989; citing U.S. Social Security Administration, Death Master File, database (Alexandria, Virginia: National Technical Information Service, ongoing).