00313nam a2200109Ia 4500008004100000041000800041100003300049245004900082260003600131650001500167999002100182240109s9999    xx            000 0 und d  aeng  aPhillps  Ravindran  Solbeog.  aOpearations Research Priniples and Practice.  bJohn Wiley and Sons New  York.   aManagement  c1019895d1019895