TY  - BOOK
AU  - Cavallo Roger E.
TI  - Role of systems methodologes in social science research
T2  - Prontiers in System Research; 1
U1  - #:f, L91 
PY  - 1979///
CY  - Boston
PB  - Martinus Nijhoff      
KW  - SOCIAL SCIENCES
ER  -