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|a Sistema de Bibliotecas de la Universidad Nacional de Agricultura
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|a 968-25-0069-9
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|a 596
|b O773
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| 100 |
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|a Dr. ORR ROBERT T.
|9 8274
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| 245 |
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|a BIOLOGÍA DE LOS VERTEBRADOS /
|c Dr. Robert T. Orr
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| 250 |
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|a 4a. ed.
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| 260 |
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|a MÉXICO
|b Interamericana
|c 1970-1978
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| 300 |
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|a 545 p.
|b Fig.
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| 650 |
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|x BIOLOGÍA
|x ASCENDENCIA DE LOS VERTEBRADOS
|x PECES Y VERTEBRADOS
|x ANFIBIOS
|x SISTEMÁTICA
|9 8275
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| 942 |
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|2 ddc
|c BK
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