Economic geology of the Beaver Quadrangle, Pennsylvania (southern Beaver and northwestern Allegheny counties)
Woolsey, Lester Hood, 1877-
Economic geology of the Beaver Quadrangle, Pennsylvania (southern Beaver and northwestern Allegheny counties) by Lester H. Woolsey. - Washington : Govt. print. off., 1906. - vi, 132, vi p. : ill., viii pl. (part fold., incl. map in pocket) diagrs. ; 24 cm.
Subject series : A. Economic geology, 74. B. Descriptive geology, 93. Issued also as House doc. no. 834, 59th Cong., 2d session.
gs 07000554
Mines and mineral resources--Pennsylvania--Beaver County.
Mines and mineral resources--Pennsylvania--Allegheny County.
QE75 / .B9 no.286
Economic geology of the Beaver Quadrangle, Pennsylvania (southern Beaver and northwestern Allegheny counties) by Lester H. Woolsey. - Washington : Govt. print. off., 1906. - vi, 132, vi p. : ill., viii pl. (part fold., incl. map in pocket) diagrs. ; 24 cm.
Subject series : A. Economic geology, 74. B. Descriptive geology, 93. Issued also as House doc. no. 834, 59th Cong., 2d session.
gs 07000554
Mines and mineral resources--Pennsylvania--Beaver County.
Mines and mineral resources--Pennsylvania--Allegheny County.
QE75 / .B9 no.286