1878. Geographical and Geological Survey of the Rocky Mountain Region (U.S.) and Powell, John Wesley, 1834-1902. 1 map : col., mounted on cloth ; 49 x 71 cm "Julius Bien, Lithographer." "The base chart was engraved for the Statistical Atlas of the United State...
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1876. Dall, William Healey, 1845-1927, Geographical and Geological Survey of the Rocky Mountain Region (U.S.), and Powell, John Wesley, 1834-1902. Relief shown by hachures. "U.S. Geographical and Geological Survey of the Rocky Mountain Region J.W. Powell in charge." From: Contributions to Nort...