1. The reinforcement of cooperation between children;Azrin;J. abnorm. soc. Psychol,1956
2. Positive reinforcers for experimental studies with children—consumables and manipulatables;Bijou;Child Develpm,1959
3. Discrimination performance as a baseline for individual analysis of young children;Bijou;Child Develpm
4. A field of applied animal psychology;Breland;Amer. Psychol,1951
5. Schedules of reinforcement.