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| 245 | 0 | 0 | _aThe discovery challenge |
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| 300 | _a1 p. | ||
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_tPetroleum Economist _gVol. 72, no. 5 (mayo 2005) ; p. 16 |
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_aWood, Tony _936431 |
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_aInnovación tecnológica _91155 |
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