Waller-Joos-Stetzler
"United States Social Security Death Index," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/JYF1-K2C : accessed 13 Mar 2014), null, 09 Nov 1991; citing U.S. Social Security Administration, Death Master File, database (Alexandria, Virginia: National Technical Information Service, ongoing).
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Title "United States Social Security Death Index," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/JYF1-K2C : accessed 13 Mar 2014), null, 09 Nov 1991; citing U.S. Social Security Administration, Death Master File, database (Alexandria, Virginia: National Technical Information Service, ongoing). Short Title George C Knapp, "United States Social Security Death Index" Source ID S537 Linked to (1) Knapp, George Carl