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Lovell, H. L. (1971). Mine Water Treatment Control. Min. Congr. J., 57(6), 83–&.
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Godard, R. R. (1970). Mine Water Treatment – Frick-district. Min. Congr. J., 56(3), 36–&.
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Lovell, H. L. (1971). Limestone Treatment Of Coal Mine Drainage. Min. Congr. J., 57(10), 28–&.
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