Harrison, Jack E. 1924- Geology of the clark fork quadrangle Idaho-Montana / by J. E. Harrison and D. A. Jobin. -- Washington : United States Government Printing Office, 1963 - 38 p. + map. -- (Geological Survey Bulletin ; 1141-K). Subjects--Topical Terms: GeologíaIdahoMontana Universal Decimal Class. No.: 55(786+796)