Mary was born in 1915. Mary Cook ... She passed away in 1986.
Sources
"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MDMD-1J6 : accessed 6 October 2019), Bernidine Cook in household of Floyd Cook, Levey, Sac, Iowa, United States; citing ED 151, sheet 10A, line 31, family 203, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 511; FHL microfilm 1,820,511.
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