00000cam a22000004a 4500 UP-1685523046125002699 Buklod 20250311101250.0 m |o d | cr ||||||||||| 250311s1980 xx r |||| u|eng|| (iLib)UPMNL-00000009915 CASM rda eng LB 1060.2 H34 1980 Hall, Robert Vance 1928-. How to select reinforcers Robert Vance Hall, Marilyn L. Hall. Austin, TX Pro-Ed. 1980 39 p. 23 cm. Behavior modification. Reinforcement (Psychology) Hall, Marilyn C. FO UPMNL CASM LB 1060.2 H34 1980 Book