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Questions and answers on timbering bituminous coal mines
Some suggestions on safety in timbering anthracite mines
Some information on timbering bituminous-coal mines
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Published Year
1920-1929 (1)
1930-1939 (2)
Subject
Mine timbering (3) *
Coal mines and mining--Safety measures (1)
Author
Currie, Robert Dewey, (1)
Forbes, John J. V. (1)
Owings, C. W. (1)
Paul, J. W. (1)
