"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M61Y-VQ9 : accessed 23 August 2017), Thomas Brennan in household of Thomas W Brennan, Plymouth Ward 1, Luzerne, Pennsylvania, United States; citing ED 174, sheet 1B, line 92, family 20, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 1596; FHL microfilm 1,821,596.
"Pennsylvania, County Marriages, 1885-1950", database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:KHFQ-JLK : 24 June 2016), Thomas W Brennan and Dorothy A Keating, 1936.
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:KQC4-C46 : accessed 23 August 2017), Thomas Brennan in household of Anna Brennan, Ward 1, Plymouth, Plymouth Borough, Luzerne, Pennsylvania, United States; citing enumeration district (ED) 40-233, sheet 13A, line 29, family 118, 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 3559.
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