"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MJLV-63V : accessed 28 February 2016), Margret Geer in household of William House, Warren, Herkimer, New York, United States; citing sheet 1B, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,821,115.
"United States Census, 1930", database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:X7Z2-VY2 : accessed 28 February 2016), Margaret Geer in entry for Wesley M Christman, 1930.
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DNA Connections
It may be possible to confirm family relationships with Margaret by comparing test results with other carriers of her ancestors' mitochondrial DNA.
However, there are no known mtDNA test-takers in her direct maternal line.
It is likely that these autosomal DNA test-takers will share some percentage of DNA with Margaret: