1. footnote 1, p. 225.225
2. Altmann, S.A. 1967. The structure of primatesocial communication. Pages 325-362 inS.A. Altmann, ed. Social CommunicationAmong Primates. University of ChicagoPress, Chicago, Ill.AltmannThe structure of primate social communication325Social Communication Among Primates1967
3. Exploration and Social Play in Squirrel Monkeys (Saimiri)