"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XQLG-R18 : accessed 2 October 2017), Mary A Flanagan in household of David J Flanagan, Lynn, Essex, Massachusetts, United States; citing enumeration district (ED) ED 155, sheet 8B, line 62, family 168, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 899; FHL microfilm 2,340,634.
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