On the Origin of Species · ¶975
Herbert, W.: on struggle for existence, 62. on sterility of hybrids, 249.Read in context ›
Charles Darwin · John Murray, London, 1859, first edition · Gutenberg #1228; original diagram from Darwin Online F373
Charles Darwin · John Murray, London, 1859, first edition · Gutenberg #1228; original diagram from Darwin Online F373
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