"Electrical viewpoint in a complete safety survey of a coal mine. "; "Gleim, E. J. (Ernest J.)"; "Mine safety.", "Coal mines and mining--Safety measures."; "Gleim, E. J. (Ernest J.)"; "1936"; "

Serial issue. Issued as: United States. Bureau of Mines. Information circular, I. C. 6894 (1936:July).

"; ""; "P20753"; "pec"; "Mine safety.", "Coal mines and mining--Safety measures."; "14256"; .