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Matthew N. Plis has written:
'COALVAL, a prefeasibility software package for evaluating coal properties using Lotus 1-2-3, release 2.2' -- subject(s): COALVAL, Coal mines and mining, Data processing, Valuation
'Preliminary evaluation of the relationship of bit wear to cutting distance, forces, and dust using selected commercial and experimental coal-and rock-cutting tools' -- subject(s): Coal mines and mining, Coal-cutting bits, Dust control, Testing
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