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_aUNESCO. Programa sobre el Hombre y la Biósfera _9116157 |
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_aTask force on _b: criteria and guidelines for the choice and estableshment of biosphere reserves: final report |
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_aParis : _bUNESCO, _c1974 |
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_a61 p. _b: ilus. |
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_aBATCH-UPD _b10 _c20130110 _lUCH01 _h1825 |
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_aBiósfera. _912844 |
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