"Mine-fan signal alarms and power releases."; "Fene, W. J. (William Joseph), 1891-", "Weaver, H. F."; "Mine ventilation--Equipment and supplies--Safety measures."; "Fene, W. J. (William Joseph), 1891-", "Weaver, H. F."; "1943"; "

Serial issue. Issued as: United States. Bureau of Mines. Information circular, 7262 (1943:Nov.)

"; ""; "P19474"; "pec"; "Mine ventilation--Equipment and supplies--Safety measures."; "14256"; .