Impact of using auxiliary fans on coal mine ventilation efficiency and cost [microform] /
Wallace, Keith G.
United States.Bureau of Mines.
Washington, D.C. (2401 E St., N.W., MS #9800, Washington 20241) : U.S. Dept. of the Interior, Bureau of Mines,
1990.
Microfiche.
Mine ventilation.
Air flow.
Fans (Machinery)
Brattices (Mining)