TY  - BOOK
AU  - Eissler,M.
TI  - The cyanide process for the extraction of gold and its practical applications on the witwatersrand gold frields in south africa
AV  - TN767 E57
PY  - 1895///
CY  - London
PB  - C. lockwood
KW  - Endurecimiento superficial
ER  -