I'm looking for information on a marriage between a Dean Thomas Hanson born March 1936 in Mpls., MN. and Margaret Berneice Snyder born Sept. 1936 in St. Paul, MN. They were MN. residents. I was told they were married in Iowa in Nov. 1956 but I don't have a city, county or any other information. Can anyone offer any suggestions or help finding this? Thanks very much.