"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M3QG-TPF : accessed 14 August 2017), Isaac C Swartley, Upper Gwynedd Township North Wales borough, Montgomery, Pennsylvania, United States; citing enumeration district (ED) 257, sheet 5A, family 96, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,241,444.
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