01358nam 2200373Ka 450 991069683400332120080728091756.0(CKB)5470000002382544(OCoLC)236164656(EXLCZ)99547000000238254420080728d1974 ua 0engtxtrdacontentcrdamediacrrdacarrierUsing sulfur hexafluoride as a gaseous tracer to study ventilation systems in mines[electronic resource] /E.D. Thimons, R.J. Bielicki, and F.N. Kissell[Pittsburgh, Pa.?] :U.S. Dept. of the Interior, Bureau of Mines,[1974]22 pages digital, PDF fileReport of investigations ;7916Title from title screen (viewed on July 28, 2008).Sulfur hexafluoride as a test gasMine ventilationSulfur hexafluoride as a test gas.Mine ventilation.Thimons Edward D1391026Bielicki Richard J1391949Kissell Fred N1351621United States.Bureau of Mines.GPOGPOBOOK9910696834003321Using sulfur hexafluoride as a gaseous tracer to study ventilation systems in mines3546287UNINA