TY  - BOOK
AU  - Norlin,Julia M.
AU  - Chess,Wayne A.,Dale,Orren  and  Smith,Rebecca
TI  - Human behavior and social environment: social systems theory 
SN  - 0205359574
AV  - HV40 .H7813
PY  - 2003///
CY  - London
PB  - Allyn & Bacon
KW  - Social service
KW  - social system
KW  - Mathematical models
KW  - Social systems
N1  - Includes bibliographical references and index
ER  -