01389nam 2200373Ka 450 991069688640332120080722103249.0(CKB)5470000002382014(OCoLC)234381956(EXLCZ)99547000000238201420080722d1994 ua 0engtxtrdacontentcrdamediacrrdacarrierEvaluation of alternative placement of longwall gob gas ventholes for optimum performance[electronic resource] /by William P. Diamond, Paul W. Jeran, and Michael A. Trevits[Washington, D.C.?] :U.S. Dept. of the Interior, Bureau of Mines,[1994]14 pages digital, PDF fileReport of investigations ;9500Title from title screen (viewed on July 18, 2008).Mine ventilationLongwall miningSafety measuresMine ventilation.Longwall miningSafety measures.Diamond W. P(William P.)1389496Jeran P. W1408214Trevits Michael A1408215United States.Bureau of Mines.GPOGPOBOOK9910696886403321Evaluation of alternative placement of longwall gob gas ventholes for optimum performance3491551UNINA