"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MN4Z-FWJ : 15 July 2017), O Ole Sale, Blue Mounds, Dane, Wisconsin, United States; citing enumeration district ED 60, sheet 227C, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 1421; FHL microfilm 1,255,421.
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