http://pec.lib.wvu.edu/record/P194561947Use of rock dust and water under the federal mine safety code in limiting coal-dust explosions.<p> Serial issue. Issued as: United States. Bureau of Mines. <em>Information circular</em>, 7421 (1947).</p>Owings, C. W. (Clarence Watson), 1894-Forbes, John J. V. (John Joseph Vincent), 1885-1975.Mine explosions.Coal mines and mining--Safety measures.14256