nited States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MNMN-JMJ : accessed 30 December 2016), Mary Lawler in household of Christifer Lawler, Philadelphia Ward 21, Philadelphia, Pennsylvania, United States; citing ED 507, sheet 1B, line 88, family 22, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 1617; FHL microfilm 1,821,617.
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