1. ; Allowing captive primates to forage. Pp. 253-256 in Standards of Laboratory Animal Management: Proceedings of Symposium, VOL. 2. Potters Bar, England, Universities Federation for Animal Welfare, 1983.
2. Activity profiles of primate groups. Pp. 69-106 in Behavior of Nonhuman Primates, VOL. 3. ; ; eds. New York, Academic Press, 1971.
3. Successful feeding enrichment for captive chimpanzees