Derrota de las bacterias / by Taylor, Frank Sherwood

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Finalidad de las actividades orgánicas / by Russell, Edward S.

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Evolution / by Shull, Aaron Franklin

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Die Entwicklung der Lebewesen / by Erben, Heinrich K.

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Biology and its relation to mankind / by Winchester, Albert McCombs

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Genera of fungi / by Clements, Frederic Edward

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Proteínas plasmáticas / by Gras, J.

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Classification of vertebrata : recent and extinct / by Gadow, M. A. Hans

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Atlas de mammiferes de France / by Rode, Paul

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Hydra und die hydroiden / by Steche, Otto

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Topographie und histologie des blutgefasssystems der aphroditiden / by Twerdochlebow, Michael

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Up from the ape / by Hooton, Earnest Albert

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Géographie botanique : étude de la végétation / by Carles, Jules

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Compte rendu de missions sur l'étude des images photographiques aériennes a grande echelle de diverses formations végétales / by Rossetti, Charles

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Embriología y genética / by Morgan, Thomas Hunt

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Introducción a la teoría y la práctica de la taxonomía numérica / by Crisci, Jorge Víctor

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Etnología de América / by Krickeberg, Walter 1885-1962

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Nuestros contemporáneos primitivos / by Murdock, George Peter 1897-1985

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Génesis de la humanidad / by Arambourg, Camille

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Diccionario de botánica / by Font Quer, Pío, 1888-1964

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