The mentality of apes /
by Wolfgang Kohler and Ella Winter
- London : Kegan Paul, Trench, Trubner, 1925
- viii, 342 p. : ix pl. (incl. port.) diagr. ; 23 cm.
- International library of psychology, philosophy and scientific method .
"Appendix: Some contributions to the psychology of chimpanzees": p. 281-342