Methane analyzer system to record continuously the methane content of coal mine ventilation air - Irani, M. C.; Lawhead David H.; Jeran, P. W. (U.S. Bureau of Mines, 1975)
Keywords: Mine ventilation. / http://id.loc.gov/authorities/subjects/sh85085544; Coal mines and mining / Safety measures. / http://id.loc.gov/authorities/subjects/sh85027377; Methane / Analysis.