000 00278nam a2200121Ia 4500
008 220811s9999 xx 000 0 und d
245 _aJOURNAL OF MINES METALS AND FUELS
260 _c2019-2019
500 _a"6,7,8,9,10,11"
500 _a67
500 _aJUN-NOV
942 _cBV
999 _c23649
_d23649