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0200017048 20030411102307.0 s1977 coua fr |10||||eng NGL a355.08 U.S. Symposium on Rock Mechanics (18th : 1977 : Keystone) 能源与挖掘技术补编(会议录). chi Energy resources and excavation technology : proceedings : 18th U.S. Symposium on Rock Mechanics, held at Keystone, Colorado, June 22-24, 1977. supplemental volume / ed. by Fun-Den Wang & George B. Clark ; sponsored by Colorado School of Mines, ect. Golden, CO : Colorado School of Mines Press, 1977. various pagings : ill. aWang, Fun-Den. ; aClark, George B. Colorado School of Mines. NGL 297616 355.08 C71/18 vS afqy b1 efqy0301