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_aHD 9560 _b7 L43 |
| 245 | 1 | 0 |
_aLegislación petrolera internacional: _bnueva etapa del proceso de liberación |
| 260 |
_aMéxico : _bSiglo Veintiuno, _c1978 |
||
| 300 |
_a841 p. ; _c21 cm. |
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| 650 | 4 |
_aPetróleo - _xLeyes y legislación |
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