01392nam 2200373 450 991070615720332120170830143447.0(CKB)5470000002454855(OCoLC)1002219394(EXLCZ)99547000000245485520170830d2013 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierTests for methane at the working face, using extendable probes or other acceptable means[Arlington, Virginia] :[U.S. Department of Labor, Mine Safety and Health Adminstration],2013.1 online resource (3 pages)Program policy letter ;no. P13-V-06"Effective date: 06/20/2013.""Reissue of P-11-V-8."Coalbed methane drainageSafety regulationsUnited StatesMine atmospheresSafety regulationsUnited StatesMine safetySafety regulationsUnited StatesCoalbed methane drainageSafety regulationsMine atmospheresSafety regulationsMine safetySafety regulationsGPOGPOBOOK9910706157203321Tests for methane at the working face, using extendable probes or other acceptable means3255053UNINA