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Singh, R.D.
Principles and practices of modern coal mining / Textual Documents - New Delhi : New Age International Publishers , 1998 - xviii,1139p ;
Coal mines and mining
622.334 / SIN;1
Principles and practices of modern coal mining / Textual Documents - New Delhi : New Age International Publishers , 1998 - xviii,1139p ;
Coal mines and mining
622.334 / SIN;1
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