"Michigan Marriages, 1868-1925," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:N3T8-3JR : accessed 27 July 2015), Mary Devos in entry for Hilka Hofstra and Nellie Linde Mulder, 29 Jun 1918; citing Highland, Missaukee, Michigan, v 4 p 56 rn 32, Department of Vital Records, Lansing; FHL microfilm 2,342,727.