TY  - BOOK
TI  - Environmental aspects of selected non-ferrous metals (Cu,Ni,Pb,Zn,Au) ore mining : a technical guide 
SN  - Technical Report Series : no.5
U1  - 333.7 UNI 
PY  - 1991///
CY  - Paris 
PB  -  United Nations Environmental Programme
KW  - Environmental Aspects-non ferrous metals
ER  -