Clason Map Co. Scale [ca. 1:1,267,000] Relief shown by hachures. "Principal auto roads shown in red. Oil and gas fields shown in orange."--Lower margin. Includes ... Clason Map Co.
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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.