TY  - BOOK
AU  - Duckworth W E
TI  - Guide to operational research
U1  - 658.4034 
PY  - 1962///
CY  - London
PB  - Methuen
KW  - Management
KW  - Operational research
N1  - 3rd ed., by W.E.Duckworth, A.E.Gear and A.G.Lockett
ER  -