Food-tokens as incentives for learning by chimpanzees
By: by John T. Cowles.
Series: Comparative psychology monographs -- v. 14, serial no. 71.
Publisher: Johns Hopkins Press
Published: 1937
Place of publication: Baltimore
Language: eng
Number of pages: 96
Subjects: Chimpanzees.; Animal intelligence.
Notes: Cover title.

Bibliography:  p.95-96.