United States Congressional serial set. 9509. page 208; Contract for Mail Service, Route No. C.A.M. 9; Contract made 11th day of January 1926 to Charles Dickinson; Route: Chicago, Illinois by Milwaukee and La Crosse, Wisconsin to St. Paul, Minnesota, and Minneapolis, Minnesota and return.
United States Congressional serial set. 9509. page 195; Contract for Mail Service, Route No. C.A.M. 9; Contract made 7th day of September 1926 to Northwest Airways (Inc.); Route: Chicago, Illinois via Milwaukee and La Crosse, Wisconsin and St. Paul, Minnesota, to Minneapolis, Minnesota and return.
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