The magnificent gateway : [electronic resource] a layman's guide to the geology of the Columbia River Gorge / by John Eliot Allen.
Material type:![Text](/opac-tmpl/lib/famfamfam/BK.png)
- 0917304101
- 9780917304101
- 557.97
- QE156.C58 A38
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Bibliography: p. [134]-138.
Includes index.
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