Hale, Jack K. Ordinary differential equations/ [by] Jack K. Hale. - New York: Wiley-Interscience, [1969]. - xvi, 332 p.: illus., 23 cm. - Pure and applied mathematics, v. 21. . - Pure and applied mathematics (Interscience Publishers) v. 21. . Bibliography: p. 325-330. ISBN: 0471340901 LCCN: 76088311 //r91 Nat. Bib. No.: GB70-8822 Subjects--Topical Terms: Differential equations. Dewey Class. No.: 515.35 / H162o