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Über die Entstehung der Arten im Thier- und Pflanzen-Reich durch natürliche Züchtung (German)
Charles Darwin
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De afstamming van den mensch en de seksueele teeltkeus, deel 2 (van 2) (Dutch)
Charles Darwin
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A Critical Examination of the Position of Mr. Darwin's Work, "On the Origin of Species," in Relation to the Complete Theory of the Causes of the Phenomena of Organic Nature
Thomas Henry Huxley
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Problems of Genetics
William Bateson
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Darwin, and After Darwin, Volumes 1 and 3
George John Romanes
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Evolution: Its nature, its evidence, and its relation to religious thought
Joseph LeConte
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The Wonders of Life: A Popular Study of Biological Philosophy
Ernst Haeckel
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The illustrated story of evolution
Marshall J. Gauvin
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Essays Upon Heredity and Kindred Biological Problems
August Weismann
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The Story of Evolution
Joseph McCabe
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Degeneration: A Chapter in Darwinism
Sir E. Ray Lankester
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Canterbury Pieces
Samuel Butler
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Vestiges of the Natural History of Creation
Robert Chambers
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Freedom in Science and Teaching.
Ernst Haeckel
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The Present Condition of Organic Nature
Thomas Henry Huxley
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Species and Varieties, Their Origin by Mutation
Hugo de Vries
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Darwiniana : Essays — Volume 02
Thomas Henry Huxley
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Darwinism stated by Darwin himself
Charles Darwin
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The Darwinian Hypothesis
Thomas Henry Huxley
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Criticisms on "The Origin of Species"
Thomas Henry Huxley
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Darwin, and After Darwin, Volume 3 of 3
George John Romanes
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Darwin, and After Darwin, Volume 2 of 3
George John Romanes
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Facts and Arguments for Darwin
Fritz Müller
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Note on the Resemblances and Differences in the Structure and the Development of the Brain in Man and Apes
Charles Darwin and Thomas Henry Huxley
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The Origin of Species
Thomas Henry Huxley
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