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020 _a9788121902816
082 _a003
_bGUP/O
100 _aGUPTA, PREM KUMAR
245 _aOPERATIONS RESEARCH
250 _a7
260 _aNew Delhi
_bS Chand & Co.
_c2022
300 _a1498
700 _aHIRA, D S
942 _cBK
999 _c35081
_d35081