"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:X4HF-C82 : accessed 26 January 2019), Grace E Ahlers in household of John F Ahlers, Dayton, Montgomery, Ohio, United States; citing enumeration district (ED) ED 207, sheet 16A, line 21, family 335, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 1854; FHL microfilm 2,341,588.
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