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Energy resources and excavation technology

Energy resources and excavation technology / Proceedings 18th U S Symposium On Rock Mechanics Held At Keystone, Colorado June 22-24, 1977 Sponsored By The Colorado School Of Mines With Cooperation From U S National Committee For Rock Mechanics - Colorado: Colorado School Of Mines Press, 1979 - xxiii, 5A5-6p.


Proceedings

620.91:624.133 / L7