1. On the Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life;Darwin,1859
2. The Descent of Man, and Selection in Relation to Sex;Darwin,1871
3. The Making of Species;Dewar,1909
4. Evolution: Essays on Aspects of Evolutionary Biology;Huxley,1938
5. Darwin's Theory of Sexual Selection and the Data Subsumed by it, in the Light of Recent Research