00382nam a2200157Ia 4500003000400000005001700004008004100021040000700062041000800069082002400077100002800101245002500129260004300154300001400197365001300211OSt20230327114409.0210423s1997    xx            000 0 und d  cAL  aeng  a658.4034 223bGUPP  aGUPTA (P K);HIRA (D S).  aOperations research.  aNew DelhibS Chand & Company Ltdc1997  axvi,1055.  b145cINR