TY  - BOOK
AU  - Ferster,Charles B.
AU  - Skinner,B.F.
TI  - Schedules of reinforcement
U1  - 159.4 
PY  - 1957///
CY  - New York
PB  - Appleton-Century-Crofts
KW  - Reinforcement (Psychology)
N1  - Includes bibliographical references and index
ER  -