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G. De Beer, Charles Darwin: Evolution by natural selection, Nelson, London 1963.
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Darwin and Henslow: the growth of an idea. Letters 1831-1860, edited by Nora Barlow, J. Murray, London 1967.
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D. L. Hull, Darwin and his critics - The reception of Darwin’s theory of evolution by the scientific community, Harvard University Press, Cambridge
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S. Ohno, Evolution by gene duplication, Springer, New York 1970.
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M. G. Ruttner, The origin of life by natural causes, Elsevier Publ. Co., Amsterdam 1971.
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