"Use of rock dust and water under the federal mine safety code in limiting coal-dust explosions."; "Forbes, John J. V. (John Joseph Vincent), 1885-1975.", "Owings, C. W. (Clarence Watson), 1894-"; "Mine explosions.", "Coal mines and mining--Safety measures."; "Forbes, John J. V. (John Joseph Vincent), 1885-1975.", "Owings, C. W. (Clarence Watson), 1894-"; "1947"; "

Serial issue. Issued as: United States. Bureau of Mines. Information circular, 7421 (1947).

"; ""; "P19456"; "pec"; "Coal mines and mining--Safety measures.", "Mine explosions."; "14256"; .