"United States Census, 1880," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MW92-BM5 : accessed 10 January 2015), Theodorus Botsen, Fillmore, Allegan, Michigan, United States; citing enumeration district 5, sheet 117D, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 0569; FHL microfilm 1,254,569.