00391nam a2200157Ia 4500003000400000005001700004008004100021040000700062041000800069082002400077100003700101245002500138260004300163300001400206365001300220OSt20230327113807.0210423s1979    xx            000 0 und d  cAL  aeng  a658.4034223b GUPP  aGUPTA (Prem Kumar) ; HIRA (D S).  aOperations research.  aNew DelhibS Chand & Company Ltdc1979  axvi,1055.  b175cINR