"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XHWH-TFS : accessed 30 August 2021), Betty Devlin in household of Frank Devlin, Philadelphia (Districts 0501-0750), Philadelphia, Pennsylvania, United States; citing enumeration district (ED) ED 725, sheet 20B, line 73, family 414, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 2116; FHL microfilm 2,341,850.
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