TY  - BOOK
AU  - Stone,Ralph W.
TI  - Mineral resources of the Elders ridge quadrangle, Pennsylvania
T2  - U.S. Geological survey. Bulletin
AV  - QE75 .B9 no. 256
PY  - 1905///
CY  - Washington
PB  - Govt. Print. Off.
KW  - Mines and mineral resources
KW  - Pennsylvania
KW  - Elders ridge quadrangle
KW  - Geology
N1  - Subject series: A, Economic geology, 51; B, Descriptive geology, 63; Includes index
ER  -