Stebbins, G. Ledyard Processes of organic evolution/ by G. Ledyard Stebbins. - Englewood Cliffs, N.J., : Prentice-Hall 1966 - xii, 191 p. illus., maps. - Concepts of modern biology series . Bibliography: p. 181-182. Subjects--Topical Terms: Evolution (Biology) Dewey Class. No.: 576.8 STE/P