TY  - BOOK
AU  - Brans J P Ed.
ED  - IFORS international conference on operational research (1981 : Hamburg)
TI  - Proceeding on Operational research
U1  - B2893p1,N81, M1 
PY  - 1981///
CY  - Amsterdam
PB  - North-Holland Publishing        
KW  -  Operations research
KW  - Management
ER  -