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The Conditions of Existence as Affecting the Perpetuation of Living Beings
Thomas Henry Huxley
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Species and Varieties, Their Origin by Mutation
Hugo de Vries
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De afstamming van den mensch en de seksueele teeltkeus, deel 2 (van 2) (Dutch)
Charles Darwin
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The Evolution Theory, Vol. 2 of 2
August Weismann
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Canterbury Pieces
Samuel Butler
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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 Story of Evolution
Joseph McCabe
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The Making of Species
Douglas Dewar and Frank Finn
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Darwin, and After Darwin, Volume 2 of 3
George John Romanes
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On the Reception of the 'Origin of Species'
Thomas Henry Huxley
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Über die Entstehung der Arten im Thier- und Pflanzen-Reich durch natürliche Züchtung (German)
Charles Darwin
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Little Masterpieces of Science: The Naturalist as Interpreter and Seer
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Evolution: Its nature, its evidence, and its relation to religious thought
Joseph LeConte
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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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The illustrated story of evolution
Marshall J. Gauvin
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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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The Past Condition of Organic Nature
Thomas Henry Huxley
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Darwiniana : Essays — Volume 02
Thomas Henry Huxley
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Problems of Genetics
William Bateson
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Facts and Arguments for Darwin
Fritz Müller
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The Wonders of Life: A Popular Study of Biological Philosophy
Ernst Haeckel
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Darwiniana; Essays and Reviews Pertaining to Darwinism
Asa Gray
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Degeneration: A Chapter in Darwinism
Sir E. Ray Lankester
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The Present Condition of Organic Nature
Thomas Henry Huxley
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