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082 _a622.2 V945
100 _aVONWAHL,S
245 0 _aINVESTMENT APPRAISAL AND ECONOMIC EVALUTION OF MINING ENTERPRISE
260 _aUSA
_bTrans Tech Publications
_c1983
300 _a24X17
942 _cBK
_2DDC
999 _c20497
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