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| 082 | _aX9(HZ551).ogf.2.N8, M8 | ||
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_aMinings. Geological And Metallurgical Institute Of India. _9247146 |
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_aNew technologies for coal mining industry _b Papers |
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_aCalcutta _bThe Author India _c1988 |
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_a83p. _ccm. |
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_aMinings _9234290 |
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_aMinings. Geological And Metallurgical Institute Of India. _9247147 |
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