Books about Zoology (sorted by popularity)
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Studies in the Theory of Descent (Volumes 1 and 2) August Weismann 131 downloads
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Von Wundern und Tieren: Neue naturwissenschaftliche Plaudereien (German) Wilhelm Bölsche 129 downloads
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Studies in the Theory of Descent, Volume II August Weismann 126 downloads
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The works of Francis Maitland Balfour, Volume 2 (of 4) : A treatise on comparative embryology: Invertebrata Francis M. Balfour 124 downloads