Hack, John Tilton 1913-1991 Postglacial drainage evolution and stream geometry in the Ontonagon area, Michigan / by John T. Hack. -- Washington : United States Government Printing Office, 1965 - 40 p. + map. -- (Geological Survey Professional Paper ; 504-B). Subjects--Topical Terms: Geología glacialMichigan Universal Decimal Class. No.: 551.33(774)