00341nam a2200109 a 450000500170000008200180001710000250003524500750006026000440013530000290017963000230020820251203091416.0  a658.4034bWAG  aWagner, Harvey M.d_  aPrinciples of operation research : applications to managerial decision  aNew DelhibPrentice Hall of Indiac1989  axii, 1039 p.c22 cm.bPB  aOperation research