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Mechanical mining in some bituminous-coal mines.
Mechanical mining in some bituminous-coal mines.
Mechanical mining in some bituminous-coal mines :progress report 9 : face haulage
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Published Year
1950-1959 (2)
1960-1969 (1)
Subject
Bituminous coal industry--United States (3) *
Coal-mining machinery (3)
Author
Dowd, J. J. (3)
Shields, J. J. (3) *
Haley, W. A. (2)
Magnuson, M. O. (1)
