Geology and mineral resources of the Bellefonte quadrangle, Pennsylvania (US Geological Survey bulletin 855.)
Series
U.S. Geological Survey bulletin ;
855.
U.S. Geological Survey bulletin ;
855.
Item Description: |
At head of title: United States Department of the Interior. |
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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. |