01196nam 2200325Ka 450 991069645290332120080307132757.0(CKB)5470000002378312(OCoLC)213097028(EXLCZ)99547000000237831220080307d1997 ua 0engtxtrdacontentcrdamediacrrdacarrierGround penetrating radar for highwall guidance[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,[1997]2 unnumbered pages digital, PDF fileTechnology news ;no. 462Title from title screen (viewed on Mar. 7, 2008)."July 1997."Coal mines and miningUnited StatesCoal mines and miningNational Institute for Occupational Safety and Health.GPOGPOBOOK9910696452903321Ground penetrating radar for highwall guidance3164745UNINA