The river and the rocks; the geologic story of Great Falls and the Potomac River Gorge
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| Corporate Authors: | , |
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| Format: | Book |
| Language: | English |
| Published: |
[Washington;
For sale by the Supt. of Docs., U.S. Govt. Print. Off.,
1970]
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| Subjects: |
| Physical Description: | v, 46 p. illus., map. 24 cm. |
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| Bibliography: | Bibliography: p. 46. |