00294nam a2200109Ia 4500082002200000100001800022245008300040260003500123300001600158500000500174700000500179  a658.4034bW133.PO  aWagner, H. M.  aPrinciples of operations research; with applications to managerial decisionsb  aNew DelhibPrentice-Hallc1973  axxii, 116p.  a  a