The magnificent gateway : [electronic resource] a layman's guide to the geology of the Columbia River Gorge / by John Eliot Allen.
Material type: TextSeries: Scenic trips to the Northwest's geologic past ; no. 1Publication details: Forest Grove, Or. : Timber Press, 1979.Description: xii, 144 p. : ill. ; 22 cmISBN:- 0917304101
- 9780917304101
- 557.97
- QE156.C58 A38
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Bibliography: p. [134]-138.
Includes index.
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