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_aAlfrecht, Andreas _9235478 |
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_aEl futuro del Universo _c Andreas Alfrecht, Christopher J. Isham |
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_aUniverso-Futuro _9235479 |
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_aIsham, Christopher J. _9235480 |
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_tConcilium _gnº. 277, 1998, págs. 593-604 _wRev134 |
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