Darwin, Charles, 1809-1882 The origin of species by means of natural selection , or The preservation of favoured races in the struggle for life / Ed. with an introd. by J. W. Burrow. - Baltimore : Penguin Books, [1968]. - 477 p. ; 18 cm. - The Pelican classics, AC1 . Includes bibliogr. references : (p. 461-462) Subjects--Topical Terms: Evolution (Biology)Natural selection