01433nam 2200361Ka 450 991069675230332120080714083609.0(CKB)5470000002381349(OCoLC)233823682(EXLCZ)99547000000238134920080714d2002 ua 0engtxtrdacontentcrdamediacrrdacarrierDrill monitor with strata strength classification in near-real time[electronic resource] /Walter K. Utt ... [and others]Spokane, WA :U.S. Dept. of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, Spokane Research Laboratory,[2002]14 pages digital, PDF fileReport of investigations ;9658Title from title screen (viewed on July 11, 2008)."July 2002."Mine roof boltingDrilling and boring machineryMine roof bolting.Drilling and boring machinery.Utt Walter K1399458Spokane Research Laboratory (National Institute for Occupational Safety and Health)GPOGPOBOOK9910696752303321Drill monitor with strata strength classification in near-real time3464672UNINA