TY  - BOOK
AU  - Butts,Charles
TI  - Economic geology of the Kittanning and Rural valley quadrangles, Pennsylvania,
T2  - U.S. Geological survey. Bulletin
AV  - QE75 .B9 no. 279
PY  - 1906///
CY  - Washington
PB  - Govt. print. off.
KW  - Mines and mineral resources
KW  - Pennsylvania
KW  - Coal
KW  - Geology
N1  - Subject series: A, Economic geology, 67; B, Descriptive geology, 83; Folded map in pocket; Issued also as House doc. no. 827, 59th Cong., 1st sess
ER  -