00422nam a22001457a 450000500170000002000180001704100080003508200180004310000180006124500670007925000120014626000470015830000240020565000470022920260504131239.0  a9780230636590  aENG  a658.4034bSHA  aSharma, J. K.  aOperations research :bproblems and solutions /cJ. K. Sharma.  a3rd ed.  aNew Delhi :bMacmillan Publishers ,c2009.  a894 pages ;c28 cm.  aOperations researchxProblems, exercises,