"Is dust, as such, explosive? : and if so, what are the chemical reactions and the most efficient preventatives? "; "Haas, Frank."; "Coal dust.", "Coal mines and mining--Safety measures."; "Haas, Frank."; "1908"; "

Pamphlet. \"A paper read before the West Virginia Mining Association, October 7, 1908, Charleston, W.Va.\"

"; ""; "P3002"; "pec"; "Coal dust.", "Coal mines and mining--Safety measures."; "14256"; .