TY  - BOOK
AU  - Li, Ta M.
AU  - Plouf, Thomas M.,
TI  - Small mines development in precious metals
SN  - 0873350693
AV  - TN410 S53
PY  - 1987///
CY  - Littleton, colorado
PB  - Society fo mining engineers
KW  - Metales preciosos
ER  -