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Geology and mineral resources of the Bellefonte quadrangle, Pennsylvania (US Geological Survey bulletin 855.)

by Butts, Charles, 1863-1946.

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Item Description: At head of title: United States Department of the Interior.
Physical Description: vi, 111 p. : ill., maps ; 23 cm. fold. col. map, fold. col. profile, fold diagr. in pocket.
Bibliography: Includes bibliographical references and index.