The origin of species a variorum text - Darwin, Charles, 1809-1882.; Peckham, Morse; ebrary, Inc. (Philadelphia [Pa.] : University of Pennsylvania Press, 1959)
With a reproduction of the t.p. of the original ed. published in 1859 under title: On the origin of species by means of natural selection.
First paperback edition 2006.
Includes bibliographical references and index.
Electronic reproduction.
Keywords: Evolution (Biology); Natural selection; Electronic books