Geologic map of the Valle 30ʹ x 60ʹ quadrangle, Coconino County, northern Arizona [cartographic material] / by George H. Billingsley, Tracey J. Felger, and Susan S. Priest ; U.S. Department of the Interior, U.S. Geological Survey ; prepared in cooperation with the National Park Service.
Relief shown by contours. Includes text, 1 index map, one location diagram, 2 col. ancillary maps and 3 col. cross sections.
- U.S. Geological Survey
- Held by
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