Economic geology of the Amity quadrangle, eastern Washington County, Pennsylvania /
Clapp, Frederick G. 1879-1944.
Economic geology of the Amity quadrangle, eastern Washington County, Pennsylvania / by Frederick G. Clapp. - Washington, Govt. Print. Off., 1907. - 145, vi p. : ill., viii pl. (partly fold., incl. maps) diagrs. ; 24 cm. - U.S. Geological survey. Buletin no. 300 . - Geological Survey (U.S.). Bulletin ; no. 300. .
Subject series: A, Economic geology, 86; B, Descriptive geology, 105. Issued also as House doc. no. 53, 59th Cong., 2d sess. Includes index.
Bibliography: p. 140.
gs 07000794
Mines and mineral resources--Pennsylvania--Washington County.
Geology--Pennsylvania--Washington County.
QE75 / .B9 no. 300
Economic geology of the Amity quadrangle, eastern Washington County, Pennsylvania / by Frederick G. Clapp. - Washington, Govt. Print. Off., 1907. - 145, vi p. : ill., viii pl. (partly fold., incl. maps) diagrs. ; 24 cm. - U.S. Geological survey. Buletin no. 300 . - Geological Survey (U.S.). Bulletin ; no. 300. .
Subject series: A, Economic geology, 86; B, Descriptive geology, 105. Issued also as House doc. no. 53, 59th Cong., 2d sess. Includes index.
Bibliography: p. 140.
gs 07000794
Mines and mineral resources--Pennsylvania--Washington County.
Geology--Pennsylvania--Washington County.
QE75 / .B9 no. 300