000 00380nam a2200121 4500
020 _a928071295X
082 _a363.731
_bENV.N1
245 _aEnvironmental Aspects of Selected non-ferrous Metals (Cu, Ni, Pb, Zn, Au) ore mining :
_bA Technical Guide
_cUnited Nations
260 _aNew York
_bUnited Nations
_c1991
300 _a116p
650 _aNon-Ferrous Metals
942 _cUN&WB
999 _c669279
_d669279