The Mentality of Apes
1925. The Mentality of Apes. Translated from the second revised edition by Ella Winter. London: Kegan Paul, Trench, Trubner. U.S. edition 1925 by Harcourt, Brace & World. Also included is a translation of Köhler's long 1921 paper as Some contributions to the psychology of chimpanzees. Appendix, p281342.