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_aQH 541 _b15 M3 M5 |
245 | 1 | 0 | _aManual de ecología |
250 | _a2a ed. | ||
260 |
_aMéxico : _bTrillas, _c1989 |
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300 |
_a266 p. : _bil. ; _c23 cm. |
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650 | 4 |
_aEcología - _xManuales |
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