00431nam a22001457i 4500001001000000005001700010008004100027082002200068100003300090245005600123260004700179300001700226650002400243020001800267SXC02837120260819093830.0260101s2006    ii            000 0 eng d  a001.424 GUP-O222  aGupta, Prem Kumar; Hira, D S10aOperations research /cGupta, Prem Kumar; Hira, D S  abS Chand & Co. Pvt Ltd., New Delhi,c2006  ap. ;c22 cm. 0aOperations research  a9780131889231