000 00292nam a2200133Ia 4500
100 _aGupta/P.K& hira D.S
942 _cBK
654 _aresearch
245 _aProblems in operation research
260 _bS.Chand & co
_aNew Delhi
_c1991
300 _a1078
546 _aENGLISH
999 _c22610
_d22610