"United States Census, 1870," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MHHB-QFY : 12 April 2016), Cora Calkins in household of Charles P Calkins, Michigan, United States; citing p. 2, family 12, NARA microfilm publication M593 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 552,180.
"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MWSK-ML7 : 11 August 2016), Cora R Calkins in household of Chas P Calkins, Grand Rapids, Kent, Michigan, United States; citing enumeration district ED 136, sheet 271A, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 0588; FHL microfilm 1,254,588.
"Michigan Marriages, 1868-1925," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:N3NH-H53 : 4 December 2014), James Wilfred Thompson and Cora Calkins, 05 Oct 1886; citing Grand Rapids, Kent, Michigan, v 2 p 148 rn 4324, Department of Vital Records, Lansing; FHL microfilm 2,342,478.
"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M9BT-PM6 : accessed 12 August 2017), Cora C Thompson in household of James W Thompson, Detroit city Ward 2, Wayne, Michigan, United States; citing enumeration district (ED) 19, sheet 7A, family 117, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,240,747.
"Michigan Death Certificates, 1921-1952," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:KF48-21V : 12 December 2014), Cora C Thompson, 19 Mar 1932; citing Detroit, Wayne, Michigan, United States, Division for Vital Records and Health Statistics, Lansing; FHL microfilm 1,973,005.
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