"United States Census, 1880," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MW33-7PL : accessed 17 January 2015), Dirk Sjarda, Muskegon, Muskegon, Michigan, United States; citing enumeration district 193, sheet 220C, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 0597; FHL microfilm 1,254,597.