TY  - BOOK
AU  - Ferster,C.B.
AU  - Perrott,Mary Carol
TI  - Behavior principles
U1  - 158.3 
PY  - 1968///
CY  - New York
PB  - New Century
KW  - Operant behavior
KW  - Reinforcement (Psychology)
N1  - Includes index
ER  -