00372nam a2200145 a 450000500170000002000150001708200220003210000160005424500500007025000120012026000310013230000220016370000200018570000210020520251203091055.0  a047185980X  a658.4034,bD, rav  aRavindran A  aOperations research : principles and practice  a2nd ed.  aNew YorkbJohn Wileyc1986  axviii, 637p, 22cm  aPhillips, Don T  aSolberg, James J