Presencia de daphnia -ctenodaphnia- menucoensis paggi, 1996 en la provincia de La Pampa -Argentina-. by Vignatti, A. M.

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Cianofíceas continentales de la provincia de la Pampa -Argentina-. by Alvarez, Susana Beatriz

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Digestibilidad de raciones de sorgos con taninos y sus efectos en el metabolismo del cerdo. by Esteves Leyte, R.

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Lexico Diatomológico. by Martínez Macchiavello, José C. A.

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Propuesta de actualización en la enseñanza de las Ciencias Biológicas en la primaria. by Ayala, Graciela I.

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Análisis de la estructura comunitaria de corales escleractinios en arrecifes de Anton Lizardo, Veracruz. by Lara, P. S.

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Morphology of gymnosperms / by Coulter, John M.

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Plants and environment : a textbook of plant autecology / by Daubenmire, R. F.

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Taxonomy of vascular plants / by Lawrencee, George H. M.

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Die Säugetiere / by Weber, Max

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Studies in the genetics of Drosophila : III. The Drosophilidae of the southwest / by Patterson, John T.

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Isospora Bigeminum var. Hominis / by Raifman, José

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Cours d'Anatomie comparée des vertébrés / by Baer, Jean G.

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Comparative embryology of the vertebrates / by Nelsen, Olin E.

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Comparative vertebrate anatomy / by Hyman, Libbie Henrietta

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Poissons, les reptiles et les oiseaux / by Figuier, Louis

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Life of the spider / by Crompton, John

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Functional anatomy of the mammal / by Leach, W. James

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Ant world / by Wragge Morley, Derek

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Dinámica de la población animal / by Sévertzov, S.A

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