00431nam a2200145Ia 4500008004100000020001500041041000800056082001300064100003400077245009000111250000600201260004500207300000900252650002400261210716s2005    xx            000 0 und d  a8121909686  aeng  a003 GUPP  aGupta, Prem Kumar; Hira, D S.  aProblems in operations research: principles and solutions.bPrinciples and solutions.  a1  aNew DelhibS Chand and Company Ltdc2005  a1078  aOperations Research