1. AUGE, R.J. 1975. Observing and terminating the stimulus signaling the large fixed-ratio schedule. Paper presented at the Midwestern Analysis of Behavior Association, Chicago. Abstract available from Wald.
2. KILLEEN, P. & WALD, B. A. 1974. Concurrent conditioned reinforcement schedules. Paper presented at the Utah Academy of Science, Arts and Letters, Logan. Abstract available from Wald.