000 00278nam a2200133Ia 4500
020 _aNULL
100 _aGupta, Prem Kumar
245 0 _aProblems In Operation Reasearch
250 _a-
260 _aN. Delhi
_bSultan Chand & Sons
500 _a0
650 _a-
942 _cBK
999 _c33099
_d33099