Zoology

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HUXLEY, THOMAS HENRY.

London, Harrison and Sons, 1888.

DARWIN, C. R.

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LEDENFELD, R.v.

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(Nature), 1974.

WEBER, MAX.

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DARWIN, CHARLES (+) FAUSTINO, CORDON (translator)

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YOUNG, J.Z.

Oxford, Clarendon-Press, 1950.

MORTENSEN, H.

SIMROTH, HEINRICH.

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