Results 351 to 357 of about 370,321 (357)

LARGE COAL MINES

School Science and Mathematics, 1913
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Coal and coal mine drainage.

Journal - Water Pollution Control Federation, 1970
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mine-run coal

2014
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sea coal mining

2014
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opencast coal mining

2014
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coal strip mining

2014
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Bituminous Coal Mining [PDF]

Harold Barger, Sam H. Schurr
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