1. Dewey, W. L., Harris, L. S., McMillan, E. D., Frankenheim, J. M., Turk, R., & Ford, R. D. Pharmacological studies of some constituents of marijuana. Report to the Committee on Problems of Drug Dependence, 1971.
2. Grilly, D. M., Ferraro, D. P., & Marriott, R. G. Lack of tolerance to the effects of marijuana on delayed matching to sample performance in chimpanzees. Paper presented at Southwestern Psychological Association, Dallas, 1972.