01222nam 2200325Ka 450 991069640750332120080403150003.0(CKB)5470000002378771(OCoLC)218499500(EXLCZ)99547000000237877120080403d1998 ua 0engtxtrdacontentcrdamediacrrdacarrierVentilation of a 40-foot, two-pass, extended cut[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,[1998]2 unnumbered pages digital, PDF fileTechnology news ;no. 472Title from title screen (viewed on Mar. 10, 2008)."May 1998."Mine ventilationUnited StatesMine ventilationPittsburgh Research Laboratory (National Institute for Occupational Safety and Health)GPOGPOBOOK9910696407503321Ventilation of a 40-foot, two-pass, extended cut3163112UNINA