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- [S28] Mary Kaune Seymour, Mary Kaune Seymour's Memories -- Legacy, (N.p.: Not published, 2000.), 4.
- [S259] 1910 US Census, Ancestry.com, (1910 United States Federal Census. Digital image, Ancestry.com. https://ancestry.com; citing National Archives microfilm publication T625, roll T624_1051.), Cooperstown, Otsego, Otsego, New York, Enumeration District: 70, Page 13A, Line 41, dwelling 272, family 296, Elma P. Butler.
- [S259] 1910 US Census, Ancestry.com, (1910 United States Federal Census. Digital image, Ancestry.com. https://ancestry.com; citing National Archives microfilm publication T625, roll T624_1051.), Cooperstown, Otsego, Otsego, New York, Enumeration District: 70, Page 13A, Line 41, dwelling 272, family 296.
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