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Structure-contour maps of the Powder River basin, Montana and Wyoming
Published: The Survey ; For sale by U.S.G.S. Information Services, 1996Description: 6 maps on 1 sheet ; each 44 x 45 cm, sheet 104 x 144 cm, folded in envelope 31 x 24 cm + 1 pamphlet (7 pages : tables, illustrations ; 28 cm).Government Document Map