1. (1990). Manipulation, gross motor behaviors, and activity states of capuchin monkeys during development. Unpublished doctoral dissertation, Washington State University.
2. (1980). Baboon mothers and infants. Cambridge: Harvard University Press.
3. (1986). The ecology of squirrel monkeys in Costa Rica. Unpublished doctoral dissertation, University of Texas at Austin.
4. The ontogeny of foraging in squirrel monkeys, Saimiri oerstedi
5. (1980). A comparison of development and mother-infant relations in patas and talapoin monkeys. Unpublished doctoral dissertation, University of California, Berkeley.