00310nam a2200109Ia 4500008004100000082001500041100002100056245004000077260003500117650002400152700002400176220204s9999    xx            000 0 und d  a519.8bACK  aAckoff,  Russell 0aFundamentals of operations research  aNew DelhibWiley Easternc1968  aOperations research  aSasienis, Maurice E