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| 040 |
_aUPES LIBRARY _bEnglish |
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| 082 |
_a622.8 _bCHA |
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| 100 |
_aChakrabarti, P. K. _91335 |
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| 245 |
_aEnvironment in underground coal mines _b: mine gases climate dust noise |
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| 260 |
_aRanchi : _bCMPDI, _c2000 |
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| 300 | _a107p. | ||
| 650 |
_aMining Engineering _96799 |
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| 942 | _cBK | ||
| 999 |
_c7379 _d7379 |
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