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| 041 | _aeng | ||
| 100 | 1 | _aColloque Ordovicien-Silurien | |
| 245 | 1 | 0 | _aCommunications |
| 250 | _a | ||
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_aParis - FRAN _bBureau de recherches geologiques et Minieres _c1971 |
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_a462p. _c27cm |
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| 490 | 0 |
_aMemoires du Bureau de Recherches Geologiques et Minieres _v v.73 |
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_xEstratigrafia _xOrdovicio _xSilurico _xGeologia historica _xPaleontologia _z |
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| 650 | _aGeologia | ||
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_m 551.733.1(061.3)(44)1971 C714 _a106978 _c _e _g |
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