Erfolgsgeheimnisse der Natur / by Haken, Hermann

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Curso intensivo de ecología avanzada / by Orians, Gordon H.

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Research programs constituting U. S. participation in the international biological program /

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Seis ensayos sobre biología general / by Del Ponte, Eduardo

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Vigésimasegunda Reunión Argentina de Ecología : fronteras en ecología : hechos y perspectivas /

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Botánica general / by Fuller, Harry J.

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Zoologie appliquée en France et aux colonies / by Pellegrin, Jacques

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Lecturas biológicas / by Reiche, Carlos

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Compendio elemental de zoologia / by Gallardo, Angel

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Elementos de química biológica / by Pando, Pedro J.

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Economic botany / by Hill, Albert F.

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History of entomology / by Essig, E. O.

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Text-book of zoology / by Parker, Thomas Jeffery

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Elementos de zoología / by Pérez Arcas, Laureano

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Nociones de genética general y breve introducción a la genética aplicada / by González Miravallez, Antonio J.

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Experimental embryology / by Morgan, Thomas Hunt

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Leitfaden für das Zoologische Praktikum / by Kükenthal, Willy

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Obras / by Housseus, Carlos Curt

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Foundations of biology / by Woodruff, Llorande Loss

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Anthropogeographie / by Ratzel, Friedrich

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