01200nam 2200349Ka 450 991069689100332120080722084020.0(CKB)5470000002381968(OCoLC)234380139(EXLCZ)99547000000238196820080722d1973 ua 0engtxtrdacontentcrdamediacrrdacarrierDegasification of virgin Pittsburgh coalbed through a large borehole[electronic resource] /H.H. Fields ... [and others][Pittsburgh, Pa.?] :U.S. Dept. of the Interior, Bureau of Mines,[1973]27 pages digital, PDF fileReport of investigations ;7800Title from title screen (viewed on July 18, 2008).Coalbed methane drainageMine ventilationCoalbed methane drainage.Mine ventilation.Fields H. H1400777United States.Bureau of Mines.GPOGPOBOOK9910696891003321Degasification of virgin Pittsburgh coalbed through a large borehole3468324UNINA