McClelland, John J.
Investigation of dust sources and control technology for longwall plow operations / by John J. McClelland and Robert A. Jankowski. - Avondale, Md. : U.S. Dept. of the Interior, Bureau of Mines, 1987. - 10 p. : ill. - Bureau of Mines information circular ; 9173 .
55051746
Mine dusts.
Longwall mining.
622.8
Investigation of dust sources and control technology for longwall plow operations / by John J. McClelland and Robert A. Jankowski. - Avondale, Md. : U.S. Dept. of the Interior, Bureau of Mines, 1987. - 10 p. : ill. - Bureau of Mines information circular ; 9173 .
55051746
Mine dusts.
Longwall mining.
622.8