"Iowa, County Marriages, 1838-1934," index, FamilySearch (https://familysearch.org/ark:/61903/1:1:KLW6-3HX : accessed 6 April 2015), Arie A Klyn in entry for Gerrit Klyn and Katherine Vanderweil, 08 Jan 1918; citing , Marion, Iowa, United States, county courthouses, Iowa.