"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MG7D-CVN : accessed 19 March 2016), Mary Harkins in household of Michael Harkins, Philadelphia Ward 38, Philadelphia, Pennsylvania, United States; citing enumeration district (ED) ED 933, sheet 5A, NARA microfilm publication T624 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,375,421.
"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M6BC-P1H : accessed 19 March 2016), Mary E Hawkins in household of Michael Hawkins, Hanover Ward 2, York, Pennsylvania, United States; citing sheet 2A, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,821,668
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K9WP-YHX : accessed 21 May 2017), Michel Harkins in household of Ray L Prim, Whittier Judicial Township, Los Angeles, California, United States; citing enumeration district (ED) 19-827A, sheet 8B, line 67, family 197, 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 259
"California Death Index, 1940-1997," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:VPVB-5Y8 : 26 November 2014), Mary Elizabeth Harkins, 22 Sep 1945; Department of Public Health Services, Sacramento.
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