Darwin, Charles, 1809-1882. On the origin of species / A facsim. of the 1st ed., with an intr od. by Ernst Mayr. - Cambridge : Harvard University Press, 1964. - xxvii, ix, 502 p. : 1 illus., port. ; 22 cm. Includes bibliographical references : p. 491-495. LCCN: 63-017196 Subjects--Topical Terms: Evolution (Biology)Natural selection. Dewey Class. No.: 575.0162 DAR