"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MJ3H-JWY : accessed 7 May 2016), Lawrence Seaman in household of Edward Seaman, Chicago Ward 7, Cook (Chicago), Illinois, United States; citing sheet 8A, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,820,316.
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:KWB8-R6X : accessed 7 May 2016), Lawrence Seaman, Ward 17, Chicago, Chicago City, Cook, Illinois, United States; citing enumeration district (ED) 103-1133, sheet 8B, family 181, NARA digital publication T627 (Washington, D.C.: National Archives and Records Administration, 2012), roll 955.
"United States Public Records, 1970-2009," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:K1CK-YF5 : accessed 7 May 2016), Lawrence A Seaman, Residence, Park Ridge, Illinois, United States; a third party aggregator of publicly available information.
"United States Social Security Death Index," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:JBVX-KJF : accessed 7 May 2016), Lawrence A Seaman, 17 Feb 2005; citing U.S. Social Security Administration, Death Master File, database (Alexandria, Virginia: National Technical Information Service, ongoing).
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