TY  - BOOK
AU  -  Skinner B. F.
TI  - Contingencies of reinforcement: a theoretical analysis
SN  - 390812803
U1  - WM425 
PY  - 1969///
CY  - New York
PB  - Appleton-Centruy-Corfts
KW  - Behavior Therapy
N2  -  Behavior Therapy
ER  -