01028cam a22002651i 4500 gs 56000115 DLC 20260227111404.0 780720s1975 dcuab b f001 0 eng gs 56000115 (OCoLC)4069466 DLC FMMD FMMD OCoLC DLC premarc QE75 .B9 no. 1026 Richards, Paul W. Geology of the Bighorn Canyon-Hardin area, Montana and Wyoming : a description of the geography, stratigraphy, structure, geomorphology, and mineral resources of the area / by Paul W. Richards. Washington : U.S. Govt. Print. Off., 1955. v, 93 p. : ill., 4 maps, diagrs., tables ; 24 cm. U. S. Geological Survey. Bulletin ; 1026 Part of illustrative matter is folded in pocket. Includes index. "Literature cited": p. 88-90. Geology Bighorn-Hardin area. Bighorn Canyon-Hardin area, Montana and Wyoming. 29041 29041