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|a 502.3
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| 245 |
1 |
0 |
|a La biósfera: un libro de Scientific American
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| 260 |
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|a Madrid :
|b Alianza,
|c 1982.
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| 300 |
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|a 267 p. :
|b il. ;
|c 18 cm.
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| 490 |
0 |
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|a El libro de bolsillo. Secc. Ciencia y técnica ;
|v 367
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| 500 |
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|a Bibliografía, p. 261-265
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| 650 |
|
4 |
|a CONSERVACION DE LOS RECURSOS
|9 6320
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1 |
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|a Téllez de García, María
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|d Miguel Kiperszmid
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|z a
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