TY  - BOOK
AU  - Norlin,Julia M.
TI  - Human behavior and the  social environment: social systems theory 
SN  - 0205359574
AV  - HV40  .H85 2003
PY  - 2003///
CY  - Boston
PB  - Allyn and Bacon
KW  - Social service
KW  - Social systems
KW  - Social system
KW  - Mathematical models
KW  - Human behavior
ER  -