Zangwill, Willard I. Nonlinear programming; a unified approach/ by Willard I. Zangwill. - Englewood Cliffs, N.J.: Prentice-Hall, [1969]. - xvi, 356 p.: illus., 24 cm. - Prentice-Hall international series in management . Bibliography: p. 332-345. LCCN: 69010606 Nat. Bib. No.: GB69-21008 Subjects--Topical Terms: Programming (Mathematics)Mathematical optimization. Dewey Class. No.: 519.92 / Z29n