000 00315nam a2200109Ia 4500
008 190703s9999 xx 000 0 und d
082 _a622.13 W927
100 _aWORLD MINING CONGRESS
245 0 _aOPTIMAL EXPLOITATION OF SOLID MINERAL RESOURCES VOL.4
260 _aNEW DELHI
_bWORLD MINING CONGRESS
942 _cBB
_2DDC
999 _c5667
_d5667