00422nam a2200157 a 450000500170000000800410001704100080005808200100006610000180007624500410009425000120013526400450014730000280019250000200022065000240024020260717091417.0260717s1991    ii            000 0 eng d  aeng04a001.41 aSwarup, Kanti10aOperations Research /cSwarup, Kanti  a6th ed. 1aNew Delhi :bSultan chand & sons,c1991.  axv, 922p. : ill ; 21cm.  aIncludes index. 4aOperations research