TY  - BOOK
AU  - Buffa Elwood S.
AU  -  Dyer James S.
TI  - Management science operations research :  Model for   
U1  - X:8:(B2893), M1 
PY  - 1981///
CY  - New York
PB  - John Wiley U. S. A.     
KW  - Operational Management
ER  -