000			00285nam a2200121Ia 4500
008			220811s9999 xx 000 0 und d
245			_aJOURNAL OF MINES METALS AND FUELS
260			_c2019-2020
500			_a"12,1,2,3,4,5,6"
500			_a"67,68"
500			_aDEC-JUNE
942			_cBV
999			_c23650 _d23650