000 00311 a2200121 4500
020 _a9788121902816
084 _2Colon Classification
_aB288
100 _aGUPTA, Prem K umar& HIRA, D S
245 _aOperations Research
250 _a7
260 _bS Chand & Company Pvt Ltd
_c2020
_aNew Delhi
942 _cGEN
999 _c624385
_d624385