01415oam 2200373Ka 450 991069689200332120080722081412.0(CKB)5470000002381958(OCoLC)234380012(EXLCZ)99547000000238195820080722d1973 ua 0engtxtrdacontentcrdamediacrrdacarrierThe direct method of determining methane content of coalbeds for ventilation design[electronic resource]by F.N. Kissell, C.M. McCulloch, and C.H. Elder[Pittsburgh, Pa.?] :U.S. Dept. of the Interior, Bureau of Mines,[1973]17 pages digital, PDF fileReport of investigations ;7767Title from title screen (viewed on July 18, 2008).Direct method of determining methane content of coalbeds for ventilation design Coalbed methaneMeasurementCoalbed methaneMeasurement.Kissell Fred N1351621McCulloch C. M(Charles M.)1389497Elder C. H(Curtis H.)1400548United States.Bureau of Mines.GPOGPOGPOBOOK9910696892003321The direct method of determining methane content of coalbeds for ventilation design3530038UNINA