TY  - BOOK
AU  - Skinner, Barrhus Frederic
TI  - CONTINGENCIES OF REINFORCEMENT
U1  - 152 
PY  - 1969///
CY  - New York
PB  - Appleton-Century-Crofts
KW  - Reinforcement (Psychology)
KW  - Operant Behavior
N1  - Includes Bibliography
ER  -