TY  - BOOK
AU  - Ruhmer, W.T. 
TI  - Handbook on the estimation of metallurgical process costs
AV  - TN 673 RUH 1991 
PY  - 1991///
CY  - Randburg
PB  - Mintek
KW  - Metallurgical Processes
N1  - special publication no. 14
ER  -