1. Abelson, P. H., 1970, Death from heroin, Science 168 :1289.
2. Adam, G., 1967, Interoception and Behavior, Publishing House of the Hungarian Academy of Sciences, Budapest.
3. Adams, W. J., Yeh, S. Y., Woods, L. A., and Mitchell, C. L., 1969, Drug-test interaction as a factor in the development of tolerance to the analgesic effect of morphine, J. Pharmacol. Exp. Ther. 168 :251.
4. Advokat, C., 1980, Evidence for conditioned tolerance of the tail flick reflex, Behav. Neur. Bioi. 29: 385.
5. Blakey, R., and Baker, R., 1980, An exposure approach to alcohol abuse, Behav. Res. Ther. 18 :319.