TY  - BOOK
AU  - Dirickx Yvo M I
AU  -  Jennergren L Peter
TI  - Systems analysis by multilevel methods with applications to economics and management
T2  - International series on applied systems analysis; 6
U1  - X:89M, L9 
PY  - 1979///
CY  - Chichester
PB  - John Wiley        
ER  -