000 00297nam a2200121Ia 4500
008 230303s9999 xx 000 0 und d
041 _aeng
082 _a658.4034 Gup
100 _aGupta (Prem kumar) & Hira (d.s)
245 _aOperations Research
260 _aNew Delhi
_bS.Chand
365 _cRS
999 _c182868
_d182868