"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XH7L-2DS : accessed 27 September 2017), Margaret Gremes in household of Michael Gallagher, Philadelphia (Districts 0501-0750), Philadelphia, Pennsylvania, United States; citing enumeration district (ED) ED 646, sheet 15B, line 91, family 255, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 2105; FHL microfilm 2,341,839.
"United States Census, 1940", database with images, FamilySearch (ark:/61903/1:1:KQXM-LKS : Thu Jun 08 23:33:52 UTC 2023), Entry for Joseph Harkins and Margaret Harkins, 1940.
"United States 1950 Census", database, FamilySearch (ark:/61903/1:1:6XBG-BJK9 : Sun Jan 29 15:22:12 UTC 2023), Entry for Margaret M Hawkins and Barbara E Hawkins, 10 April 1950.