000 00336nam a2200121Ia 4500
008 100324s9999 xx 000 0 und d
100 _aTilton John E.
245 _aChanging patterns of mineral trade
260 _bColorado School of Mines
541 _gGratis
650 _aTRADE
942 _cBK
999 _c71816
_d71816