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Geology of the Buchanan quadrangle, Liberia
1 online resource (iv, 31 pages) : illustrations.
by Russell G. Tysdal ; prepared in cooperation with the Liberian Geological Survey under the sponsorship of the Agency for International Development, U.S. Department of State.
"This report describes the geology shown on U.S. Geological Survey Miscellaneous Investigations Map I-778-D."
Includes bibliographical references (pages 30-31).