000 00274nam a2200121Ia 4500
008 220811s9999 xx 000 0 und d
245 _aJOURNAL OF MINES METALS AND FUELS
260 _c2019-2019
500 _a"1,2,3,4,5"
500 _a67
500 _aJAN-MAY
942 _cBV
999 _c23648
_d23648