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_c13562 _d13562 |
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_aUPES LIBRARY _bEnglish |
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_a622.338 _bONGC |
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| 100 |
_aOil and natural gas corporation _912588 |
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| 245 | _aDrilling data handbook | ||
| 260 |
_aDehradun: _bOil and Naural Gas Corporation, _c2003 |
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| 300 | _aV.P. | ||
| 650 |
_aOil well drilling _98233 |
||
| 942 | _cBK | ||