"United States Census, 1880," index and images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MW92-RSK : accessed 27 April 2015), Klaas Gommer, Laketown, Allegan, Michigan, United States; citing enumeration district 6, sheet 137C, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 0569; FHL microfilm 1,254,569.