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1200081385 20060126155046.0 d19791986coubr p r 0 a0eng | NGL a720.6 Miner. energy resour Mineral & energy resources Mineral & energy resources : [a review of developments]. [Golden, CO.] : Colorado School of Mines, 1979-1986. 8 v. : ill. ; 28 cm. Bimonthly v.22, no.4-v.29, no.6; July 1979-Nov. 1986 Periodicals. ; Periodicals. Mines and mineral resources Colorado School of Mines MIB. Mineral industries bulletin 0010-1745 NGL P 720.6 M66i ayll b eyll04x07