01344nam 2200349 450 991070455710332120130604102033.0(CKB)5470000002442133(OCoLC)841579483(EXLCZ)99547000000244213320130503d2012 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierPhasing out CSE Corporation SR-100 self-contained self-rescuers and enforcement[Arlington, Virginia] :[U.S. Department of Labor, Mine Safety and Health Adminstration],2012.1 online resource (7, 4 pages)Procedure instruction letter ;no. I12-V-18Title from subject line (viewed on May 3, 2013)."Effective Date: 07/26/2012, Expiration Date: 03/31/2014."Mine safetyEquipment and suppliesSafety regulationsUnited StatesMine atmospheresUnited StatesSafety measuresMine safetyEquipment and suppliesSafety regulationsMine atmospheresSafety measures.GPOGPOBOOK9910704557103321Phasing out CSE Corporation SR-100 self-contained self-rescuers and enforcement3259401UNINA