00324nam a2200121Ia 4500008004000000082001700040100003900057245004200096250000500138260003500143300001400178650001000192210210b1983   xxu||||| |||| 00| 0 eng d  a001.424 GUPO  aGUPTA (Prem Kumar) and HIRA (D S).  aOperations research: an introduction.  a  aN DbS. Chand & Co. Ltd.c1983  aviii, 918  aO R