Books in Category: Science - Biology (sorted by popularity)
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Syndrome Thomas Hoover 600 downloads
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The Bird Book Chester A. Reed 599 downloads
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The Human Side of Animals Royal Dixon 597 downloads
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Handbook of Birmingham British Association for the Advancement of Science 590 downloads
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Natural History of Cottonmouth Moccasin, Agkistrodon piscovorus (Reptilia) Ray D. Burkett 587 downloads
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Creierul, O Enigma Descifrata (Romanian) Dorin Teodor Moisa 581 downloads
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More Letters of Charles Darwin — Volume 2 Charles Darwin 581 downloads
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Zoonomia; Or, the Laws of Organic Life, Vol. I Erasmus Darwin 578 downloads
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An Introduction to the History of Science Walter Libby 578 downloads
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The Nature of Animal Light E. Newton Harvey 578 downloads
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Handbuch der Pharmakognosie : Zweiter Band. Spezielle Pharmakognosie (German) A. Tschirch 575 downloads
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Sex-linked Inheritance in Drosophila Thomas Hunt Morgan and Calvin B. Bridges 575 downloads
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The Book of the Pearl George Frederick Kunz and Charles Hugh Stevenson 573 downloads
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The Foundations of the Origin of Species Charles Darwin 569 downloads
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Life and Letters of Charles Darwin — Volume 2 Charles Darwin 568 downloads
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A Civic Biology, Presented in Problems George W. Hunter 566 downloads
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The Naturalist on the River Amazons Henry Walter Bates 566 downloads
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An introduction to the study of mammals living and extinct Richard Lydekker and William Henry Flower 563 downloads
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The Lobster Fishery of Maine John N. Cobb 556 downloads
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Forest Trees of Texas: How to Know Them Wilbur R. Mattoon and C. B. Webster 556 downloads
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The Principles of Biology, Volume 1 (of 2) Herbert Spencer 554 downloads
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Buchanan's Journal of Man, August 1887 553 downloads
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Antarctic Penguins: A Study of Their Social Habits G. Murray Levick 552 downloads
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The Natural History of Pliny, Volume 5 (of 6) the Elder Pliny 550 downloads
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Our Domestic Birds: Elementary Lessons in Aviculture John H. Robinson 549 downloads