00258nam a2200109Ia 4500082002200000100001900022245004900041260003100090300001700121500000500138700000500143  a658.4034bH332.OR  aHartley, R. V.  aOperations research; a managerial emphasisb  aCaliforniabGoodyearc1976  axviii, 795p.  a  a