000 00299nam a2200145Ia 4500
100 _aGupta/P.K
942 _cBK
366 _f20
245 _aProblems in operation research
260 _bS.Chand & C0
_c1991
082 _a658.4034/GUP
_bGUP
300 _a1171
546 _aENGLISH
999 _c22611
_d22611