TY  - BOOK
AU  - Dorr,John Van Nostrand
TI  - Cyanidation and concentration of gold and silver ores / 
PY  - 1936///
CY  - New York : , London : 
PB  - McGraw-Hill Book Company, inc.
KW  - ORO
KW  - METALURGIA
KW  - PLATA
ER  -