Explosions and fires in bituminous-coal mines :
Coal-mine accident-prevention course.
Section 4. /
United States. Bureau of Mines.
|Corporate Author:||United States.|
Washington, D.C. : U.S. Govt. Print. Off., 1946.
Mine fires > United States > Prevention and control.
Coal mine accidents > United States > Prevention.
At head of title: United States Dept. of the Interior; J.A. Krug, secretary. Bureau of Mines, James Boyd, director.
vii, 107 p. :
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