"Michigan, Marriages, 1868-1925," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/N35M-T8N : accessed 14 March 2015), Enno Bytwerk and Margaret Middlecamp, 26 Oct 1916; citing Muskegon, Muskegon, Michigan, v 4 p 220 rn 10601, Department of Vital Records, Lansing; FHL microfilm 2,342,716.