TY  - BOOK
AU  - Pardee,Joseph Thomas
AU  - Schrader,Frank Charles
TI  - Metalliferous deposits of the greater Helena mining region, Montana,
T2  - U.S. Geological survey. Bulletin 842
AV  - QE75 .B9 no. 842
PY  - 1933///
CY  - Washington
PB  - U.S. Govt. Print. Off.
KW  - Ore deposits
KW  - Montana
KW  - Geology
ER  -