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The Nature of Animal Light
E. Newton Harvey
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More Letters of Charles Darwin — Volume 2
Charles Darwin
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Ideen zu einer Physiognomik der Gewächse (German)
Alexander von Humboldt
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Animal Parasites and Messmates
P. J. van Beneden
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Evidence as to Man's Place in Nature
Thomas Henry Huxley
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Life's Dawn on Earth
Sir John William Dawson
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De afstamming van den mensch en de seksueele teeltkeus, deel 1 (van 2) (Dutch)
Charles Darwin
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My Studio Neighbors
W. Hamilton Gibson
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The Antiquity of Man
Sir Charles Lyell
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First Principles
Herbert Spencer
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Mammals of Northwestern South Dakota
J. Knox Jones and Kenneth W. Andersen
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Evolution, Old & New
Samuel Butler
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On the Origin of Species by Means of Natural Selection
Charles Darwin
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Vertebrates from the Barrier Island of Tamaulipas, México
Richard F. Johnston, Robert K. Selander, B. J. Wilks, and Gerald G. Raun
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Species Plantarum, Sections I-III (Latin)
Carl von Linné
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Birds of the Indian Hills
Douglas Dewar
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Sex-linked Inheritance in Drosophila
Thomas Hunt Morgan and Calvin B. Bridges
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The Coming of Evolution: The Story of a Great Revolution in Science
John W. Judd
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Seed Dispersal
W. J. Beal
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Ways of Nature
John Burroughs
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Life Movements in Plants, Volume II
Jagadis Chandra Bose
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Versuche über Pflanzenhybriden (German)
Gregor Mendel
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The History of Creation, Vol. 1 (of 2)
Ernst Haeckel
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Lehrbuch der Botanik für Hochschulen (German)
A. F. W. Schimper, Eduard Strasburger, Fritz Noll, and H. Schenck
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The Genetic Effects of Radiation
Isaac Asimov and Theodosius Dobzhansky
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