"Wisconsin, County Marriages, 1836-1911," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:XR2N-L8B : 3 June 2016), Raphael Katz and Caroline Helene Marks, 20 Jul 1874; citing , City Of City Of Fond Du Lac, Wisconsin, United States, Wisconsin Historical Society, Madison; FHL microfilm 1,266,976. نسخة محفوظة 24 سبتمبر 2016 على موقع واي باك مشين.
web.archive.org
"Wisconsin, County Marriages, 1836-1911," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:XR2N-L8B : 3 June 2016), Raphael Katz and Caroline Helene Marks, 20 Jul 1874; citing , City Of City Of Fond Du Lac, Wisconsin, United States, Wisconsin Historical Society, Madison; FHL microfilm 1,266,976. نسخة محفوظة 24 سبتمبر 2016 على موقع واي باك مشين.