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_a577 _bYOU 2006 |
| 100 | 1 | _aYoung Medina, Marco Antonio | |
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_aEcología y medio ambiente _cMarco Antonio Young Medina, J. Eduardo Young Medina |
| 264 |
_aMéxico _bCiencia Educativa _c1999 |
||
| 300 |
_a183 p. _bil. _c25 cm. |
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| 500 | _a10a reimp. 2006 | ||
| 650 | 4 | _aEcología | |
| 650 | 4 | _aMedio ambiente | |
| 905 | _alibros | ||
| 950 | _c20080627 | ||
| 950 | _c20111027 | ||
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