Williamson, Richard E. Multivariable mathematics / Richard E. Williamson, Hale F. Trotter. - 3rd. - New Jersey : Prentice-Hall, 1996. - xv, 732 p. ; 24 cm. Includes index. Open. ISBN: 0131816454 LCCN: 9536238 Subjects--Topical Terms: Algebras, Linear.Differential equations.Calculus.