00278nam a2200097Ia 4500008004000000082001700040100003200057245004800089260003500137300000800172210210b1976   xxu||||| |||| 00| 0 eng d  a001.424 PHIO  aPHILLIPS (Don T) and others  aOperations research: principles & practice.  aN YbJohn Wiley and Sonsc1976  a585