Geologic map of the Canyon Ferry Dam 30ʹ x 60ʹ quadrangle, west-central Montana [cartographic material] / by Mitchell W. Reynolds and Theodore R. Brandt ; U.S. Department of the Interior, U.S. Geological Survey.
Relief shown by contours and shading. Includes text, 5 location diagrams, index map, 4 col. ancillary maps, 3 col. cross-sections, and 6 col. photos.
- U.S. Geological Survey
- Held by
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