"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MNHC-Y2K : accessed 6 June 2016), John Johnson in household of Martinus Johnson, Martel, Pierce, Wisconsin, United States; citing enumeration district ED 112, sheet 110C, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 1441; FHL Wisconsin State Census, 1905," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MM3Y-5VR : accessed 6 June 2016), John M. Johnson, River Falls town, Pierce, Wisconsin; citing p. 305, line 32, State Historical Society, Madison; FHL microfilm 1,020,980. "United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MP2K-2LS : accessed 6 June 2016),