"United States Census, 1850," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MXST-QD8 : 12 April 2016), Ephraim Blackburn, Fairfield, Columbiana, Ohio, United States; citing family 617, NARA microfilm publication M432 (Washington, D.C.: National Archives and Records Administration, n.d.).
"United States Census, 1860", database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MCLP-451 : 13 December 2017), E Blackburn, 1860, Rutland Township, Meigs, Ohio, United States.
"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MD24-63R : 17 August 2017), Ephram Blackburn, Eden, Decatur, Iowa, United States; citing enumeration district ED 62, sheet 316A, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 0336; FHL microfilm 1,254,336.
"Iowa State Census, 1885," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:HCKB-L3Z : 11 March 2018), Ephriam Blackburn, Eden, Decatur, Iowa; citing p. 25, 1885, State Historical Society, Des Moines; FHL microfilm 1,021,460.
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