02254nam 2200481Ia 450 991069651170332120080516101523.0(CKB)5470000002379738(OCoLC)228139135(EXLCZ)99547000000237973820080516d2006 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierRoof bolting machine operators skills training for a walk-thru roof bolter[electronic resource] trainer's guide /by William Wiehagen ... [and others]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,[2006]52 unnumbered pages digital, PDF fileInformation circular ;9489DHHS (NIOSH) publication ;no. 2006-135Title from title screen (viewed on Apr. 8, 2008)."August 2006.""This document is based on collaborative work under a Cooperative Research and Development Agreement (CRADA NIO-00-002) between NIOSH and Twentymile Coal Co."-P. [4].Includes bibliographical references (page [48]).Roof bolting machine operators skills training for a walk-thru roof bolter Mine roof boltingEquipment and suppliesMine roof boltingAccidentsUnited StatesCoal-mining machineryUnited StatesSafety measuresMine roof controlUnited StatesEquipment and suppliesMine roof boltingEquipment and supplies.Mine roof boltingAccidentsCoal-mining machinerySafety measures.Mine roof controlEquipment and supplies.Wiehagen William J1415654Pittsburgh Research Laboratory (National Institute for Occupational Safety and Health)Twentymile Coal Co.GPOGPOBOOK9910696511703321Roof bolting machine operators skills training for a walk-thru roof bolter3518327UNINA