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|a Sistema de Bibliotecas de la Universidad Nacional de Costa Rica
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|a H050
|b P195p
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|a Ballenas al borde de la extinción
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|t Panorama internacional
|g Vol.1, no.30 (jul. - 1990), p.47-48
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| 852 |
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|a Biblioteca Joaquín García Monge. Hemeroteca
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