A geological reconnaissance in northern Idaho and northwestern Montana Calkins, Frank C. creator text dcu Washington Govt. Print. Off. 1909 monographic eng
print
112 p. : ill., fold. map ; 24 cm. by F.C. Calkins. With notes on the economic geology, by D.F. MacDonald. Includes index. n-us-id n-us-mt Geology Idaho Geology Montana QE75 .B9 no. 384 Bulletin ; 384 United States. Geological Survey. gs 09000249 DLC 790419 20260227111309.0 gs 09000249