dustiness of different coal seams
By: by R.J. Seibel and F.E. McCall
Contributors: McCall, F. E., joint author; United States. Bureau of Mines
Publisher: U.S. Dept. of the Interior
Published: 1974
Place of publication: [Washington]
Language: eng
Subjects: Mine dusts; Coal mines and mining -- Dust control
Other titles: Bureau of Mines Dust Control Program