00406nam a2200181Ia 4500003000400000005001700004008004100021020001500062040000700077041000800084082001800092100001900110245002500129250000600154260004000160300001100200365001300211OSt20230421100323.0210423s2008    xx            000 0 und d  a8125912754  cAL  aeng  a658.4034 KALS  aKALAVATHY (S).  aOperations research.  a2  aNew DelhibVikas Publicationsc2008  axv,536  b150cINR