01510nam 2200385 450 991070455650332120130701123009.0(CKB)5470000002442139(OCoLC)851380125(EXLCZ)99547000000244213920130701d2012 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierProcedure for permitting the use of belt air to ventilate working sections of underground coal mines[Arlington, Va.] :[U.S. Department of Labor, Mine Safety and Health Adminstration],2012.1 online resource (2 pages)Procedure instruction letter ;no. I12-V-14Title from subject line (viewed on July 1, 2013)."Effective Date: 05/07/2012, Expiration Date: 03/31/2014.""Reissue of I10-V-06."Mine ventilationUnited StatesEquipment and suppliesMine ventilationSafety regulationsUnited StatesMine atmospheresUnited StatesSafety measuresMine ventilationEquipment and supplies.Mine ventilationSafety regulationsMine atmospheresSafety measures.GPOGPOBOOK9910704556503321Procedure for permitting the use of belt air to ventilate working sections of underground coal mines3259395UNINA