00473     2200181   4500001002100000005001500021035002000036008004100056245004100097100001800138260003100156300002600187020001500213084001600228082001000244650002300254990001400277INLIS00000000000716420260519020257  a0010-0317007162260519                           0      1 aOperational research /cW. M. Harper1 aHarper, W. M.  bMacDonald and Evans,c1979  axv, 301 hlm. ;c18 cm  a0712115145  a511.8 Har o  a511.8  aRESEARCH OPERATION  a300090881