01238nam 2200361Ka 450 991069687710332120080723082252.0(CKB)5470000002382108(OCoLC)234884355(EXLCZ)99547000000238210820080723d1986 ua 0engtxtrdacontentcrdamediacrrdacarrierComparisons between cross-measure boreholes and surface gob holes[electronic resource] /by T.W. Goodman and J. Cervik[Pittsburg, Pa.?] :U.S. Dept. of the Interior, Bureau of Mines,[1986]14 pages digital, PDF fileReport of investigations ;9013Title from title screen (viewed on July 22, 2008).Coalbed methane drainageLongwall miningCoalbed methane drainage.Longwall mining.Goodman Tobias W1406794Cervik Joseph1389517United States.Bureau of Mines.GPOGPOBOOK9910696877103321Comparisons between cross-measure boreholes and surface gob holes3486552UNINA