TY  - BOOK
AU  - Williams,Jon L.
TI  - Operant learning: : procedures for changing behavior 
SN  - 0818500581
PY  - 1973///
CY  - Monterey, Ca.
PB  - Brooks/Cole Publishing Co.
KW  - Operant conditioning
N1  - Bibliography: p. 216-232
ER  -