"United States Census, 1860", database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:MW9K-7WV : 11 November 2020), Friedrich Nicolaus, 1860. Jackson, Washington, Wisconsin, United States
"United States Census, 1880," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:MNHG-4HN : 14 November 2020), Fridrich Nicklaus, Washington, Wisconsin, United States; citing enumeration district ED 246, sheet 429A, NARA microfilm publication T9 (Washington, D.C.: National Archives and Records Administration, n.d.), FHL microfilm 1,255,450.
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