"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MW92-5B5 : 14 August 2017), Hendrik Wurding in household of Roelof Wurding, Overeisel, Allegan, Michigan, United States; citing enumeration district ED 4, sheet 99A, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 0569; FHL microfilm 1,254,569.