00261nam a2200109Ia 4500100003100000654001400031245003900045260002900084082001800113300000800131546001200139  aGupta/Premkumar/ Hira/D.S   aOperation  aOperation Research:An Introduction  bS.ChandaNew Delhic1986  a658.4034bGUP  a918  aENGLISH