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Proceedings of the International Workshop on Numerical Modeling for Underground Mine Excavation Desi

International Workshop on Numerical Modeling for Underground Mine Excavation Design (2009 : Asheville, NC)
Pittsburgh, PA : Department of Health and Human Services, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Pittsburgh Research Laboratory, 2009. 2009

Proceedings of the International Workshop on Rock Mass Classification in Underground Mining

International Workshop on Rock Mass Classification in Underground Mining (2007 : Vancouver, B.C.)
[Pittsburgh, PA] : U.S. Dept. of Health and Human Services, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Pittsburgh Research Laboratory, [2007] 2007