United States Census, 1910, database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MKZK-31B : accessed 4 January 2018), Herman K Merker in household of Herman C Merker, Chicago Ward 25, Cook, Illinois, United States; citing enumeration district (ED) ED 1052, sheet 8A, family 222, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 267; FHL microfilm 1,374,280.
United States Social Security Death Index, database, FamilySearch (https://familysearch.org/ark:/61903/1:1:JTRT-LYZ : 20 May 2014), Herman K Merker, 28 Apr 1996; citing U.S. Social Security Administration, Death Master File, database (Alexandria, Virginia: National Technical Information Service, ongoing).
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