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020 _a812190289
020 _a9788121902816
040 _aUPES LIBRARY
_bEnglish
082 _a001.424
_bGUP
100 _aGupta, Prem Kumar
_98145
245 _aOperation research
260 _aNew Delhi
_bS Chand
_c2001
300 _axvi, 1055p.
650 _aOperation research
_96657
700 _aHira, D S
_93437
942 _cGG
999 _c20131
_d20131