"Michigan, Marriages, 1868-1925," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/NQWM-3P2 : accessed 22 May 2014), Enwke Spoelstra and Hendrika Lanting, 14 Oct 1887; citing Grand Rapids, Kent, Michigan, v 2 p 210 rn 46, Department of Vital Records, Lansing; FHL microfilm 2342481.