TY  - BOOK
AU  - Bellack,Alan S.
AU  - Hersen,Michel
TI  - Behavior modification: an introductory textbook 
SN  - 0683005138
AV  - BF637 .B4.B47
PY  - 1977///
CY  - Baltimore
PB  - Williams & Wilkins
KW  - Behavior modification
N1  - Includes bibliographical references and index
ER  -