Oil and gas investigations, preliminary map. 84. Geology of Worland-Hyattville area. Big Horn and Washakie Counties, Wyo. [with text]; by C. P. Rogers, jr., P. W. Richards, L. C. Conant, J. D. Vine. and D. F. Notley. Scale 1 m.=1.3 in. n. p.

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