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A comparison of borer, ripper, and conventional mining products in Illinois No. 6 seam coal
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Published Year
1970-1979 (1)
Subject
Coal--Illinois--Analysis (1)
Coal-handling (1) *
Mining engineering--Illinois (1)
Author
Engelmann, William H. (1)
Fumanti, R. R. (1) *
Schmidt, Robert L. (1)
