00290nam a2200109Ia 4500008004100000041000800041100001500049245003700064260004300101650001500144999002100159240109s9999    xx            000 0 und d  aeng  aF.M.Wilkes  aElements of Operational Research  bMcGrow Hill Internnational. New Delhi   aManagement  c1020850d1020850