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| 245 | 0 | 0 | _aImprovements of ebullated-bed technology for upgrading heavy oils |
| 270 | _a12/09/06 ; 26/06/02 | ||
| 300 | _a9 p. | ||
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_tOil and Gas Science and Technology _gVol. 55, no. 4 (jul.-agos. 2000) ; p. 397-406 |
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