TY  - BOOK
AU  - SUNDEL,Martin
AU  - Sundel,Sandra Stone
TI  - Behavior modification in the human services: a systematic introduction to concepts and applications 
SN  - 0471835668
U1  - 150.1943 
PY  - 1975///
CY  - New York
PB  - Wiley
N1  - Includes bibliographies and index
ER  -