"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MLMH-JJS : accessed 18 March 2022), William Montgomery in household of W J Montgomery, Piney, Texas, Missouri, United States; citing enumeration district (ED) ED 109, sheet 12B, family 232, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 826; FHL microfilm 1,374,839.
"United States Census, 1930," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:XHV6-RDX : accessed 18 March 2022), William M Montgomery, Piney, Texas, Missouri, United States; citing enumeration district (ED) ED 17, sheet 4B, line 72, family 90, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 1249; FHL microfilm 2,340,984.
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K7WG-GCR : 7 December 2019), William Montgomery, Piney Township, Texas, Texas, Missouri, United States; citing enumeration district (ED) 108-19, sheet 2A, line 19, family 16, Sixteenth Census of the United States, 1940, NARA digital publication T627. Records of the Bureau of the Census, 1790 - 2007, RG 29. Washington, D.C.: National Archives and Records Administration, 2012, roll 2161.
"United States Social Security Death Index," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:JYY1-Z5Q : 10 January 2021), William Montgomery, Sep 1978; citing U.S. Social Security Administration, Death Master File, database (Alexandria, Virginia: National Technical Information Service, ongoing).
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