01258cam a2200301 4500 gs 68000275 DLC 20260227111423.0 690605s1967 mtuab b 00010 eng c gs 68000275 //r862 U.S. Geological Survey Library QE133 .S5 553/.24/097866 Silverman, A. J. (Arnold J.), 1931- Stratigraphy and economic geology of the Great Falls-Lewistown coal field, central Montana, by Arnold J. Silverman and William L. Harris. Butte, Montana College of Mineral Science and Technology; [for sale by Montana Bureau of Mines and Geology] 1967. iv, 20 p. illus., maps (1 fold. in pocket) 28 cm. 0.75 Montana. Bureau of Mines and Geology. Bulletin 56 Prepared in cooperation with Montana University System Coal Resources Research Council. Bibliography: p. 17. Geology Montana. Coal Montana. Geology, Stratigraphic Mesozoic. Harris, William L., joint author. Great Falls-Lewistown coal field, central Montana. Bulletin (Montana Bureau of Mines and Geology) ; 56. 30496 30496