TY  - BOOK
AU  - Woolsey,Lester Hood
TI  - Economic geology of the Beaver Quadrangle, Pennsylvania: (southern Beaver and northwestern Allegheny counties)
AV  - QE75 .B9 no.286
PY  - 1906///
CY  - Washington
PB  - Govt. print. off.
KW  - Mines and mineral resources
KW  - Pennsylvania
KW  - Beaver County
KW  - Allegheny County
N1  - Subject series : A. Economic geology, 74.  B. Descriptive geology, 93; Issued also as House doc. no. 834, 59th Cong., 2d session
ER  -