01594nam 2200349Ka 450 991069665740332120080609082041.0(CKB)5470000002380287(OCoLC)231307571(EXLCZ)99547000000238028720080609d2001 ua 0engtxtrdacontentcrdamediacrrdacarrierProceedings of the second international workshop on coal pillar mechanics and design, Information Circular (IC) 9448[electronic resource][Pittsburgh, PA] :U.S. Dept. of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health,[2001]2 unnumbered pages digital, PDF fileTechnology news ;no. 492Title from title screen (viewed on Mar. 13, 2008)."Milestones in Mining Safety and Health Technology.""August 2001."Proceedings of the second international workshop on coal pillar mechanics and design, Information Circular Pillaring (Mining)Design and constructionPillaring (Mining)Design and construction.Pittsburgh Research Laboratory (National Institute for Occupational Safety and Health)GPOGPOBOOK9910696657403321Proceedings of the second international workshop on coal pillar mechanics and design, Information Circular (IC) 94483123700UNINA