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_a639.9 _bPRO 1970 |
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_aProblemas de conservación _bla fauna _cEncyclopaedia Britannica Educational Corporation |
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| 440 | 0 | _aEnvironment in crisis | |
| 500 | _aTraducción de: Problems of conservation wildlife | ||
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| 546 | _aDoblaje al español | ||
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| 650 | 2 | 4 | _aEspecies en peligro de extinción |
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| 950 | _c20111027 | ||
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