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Pages of Stone: Geology of Western National Parks and Monuments

by Halka Chronic

ISBN 13: 9780898861556

Format: Paperback (158 pages)
Publisher: Mountaineers Books
Published: Jun 1988

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Roadside Geology of Colorado

by Halka Chronic

ISBN 13: 9780878421053

Format: Paperback (336 pages)
Publisher: Mountain Press Publishing Company
Published: Jun 1980

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