TY  - BOOK
AU  - Ruberti,A.
TI  - Systems sciences and modelling / 
SN  - 9027716617
U1  - 003 
PY  - 1984///
CY  - Paris
PB  - UNESCO, 
KW  - Generalities
KW  - Systems analysis
KW  - Science
KW  - Mathematical models
KW  - Essays
ER  -