"Illinois, Cook County Marriages, 1871-1920," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/N7CY-4PN : accessed 26 Sep 2014), Louis Schoonefeld and Margaret Van Vossen, 26 Jun 1913; citing Summit, Cook, Illinois, 633382, Cook County Courthouse, Chicago; FHL microfilm 1030550.