1. The aversive control of an operant discrimination;Appel;J. exp. Anal. Behav,1960
2. Some schedules involving aversive control;Appel;J. exp. Anal. Behav,1960
3. Generalization to varying tone frequencies as a function of intensity of unconditioned stimulus;Bersh;School of Aviation, USAF,1956
4. Animal experimental evaluation of drug effects upon behavior;Brady;Proc. assoc. Res. Nerv. Ment. Disease,1959