TY  - BOOK
AU  - Dirjckx Yuo M. I.
AU  -  Jennergren L. Peter
TI  - Systems analysis by multilevel methods :  With appl   
T2  - International series on Applied System Analysis, 6
U1  - X:8:(B2893), L9 
PY  - 1979///
CY  - Chichester
PB  - John Wiley         
KW  - Operational Management
ER  -