"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MHQP-1ST : 14 December 2015), Joseph S Blackburn in household of Mary A Blackburn, Los Angeles Assembly District 66, Los Angeles, California, United States; citing sheet 2B, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,820,110.
"California, County Marriages, 1850-1952," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K8ZR-166 : accessed 15 April 2016), J S Blackburn in entry for Oscar Abraham Hilton and Mary C Meadows, 30 Nov 1920; citing Los Angeles, California, United States, county courthouses, California; FHL microfilm 2,074,265
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K97F-25D : accessed 15 April 2016), Mary Hilton in household of Oscar Hilton, El Monte Judicial Township, Los Angeles, California, United States; citing enumeration district (ED) 19-159, sheet 1B, family 29, NARA digital publication T627 (Washington, D.C.: National Archives and Records Administration, 2012), roll 228.
California Death Index, 1940-1997," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:VGBZ-C5L : accessed 15 April 2016), Mary Catherine Hilton, 28 Aug 1980; Department of Public Health Services, Sacramento.
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