1875. Geological and Geographical Survey of the Territories (U.S.). Scale [1:253,440]. 4 miles = 1 in. From Powell's Exploration of the Colorado River ... l875. Relief shown by contours. Department of the Interior, ... The Survey.
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1875. Bechler, Gustavus R. and Geological and Geographical Survey of the Territories (U.S.). Map II of district surveyed by G.R. Bechler. 1 map; 35 x 55 cm.