Smith, M. G. Introduction to the theory of partial differential equations / M. G. Smith. - London : D. Van Nostrand, c 1967. - x, 214 p. : ill. ; 24 cm. - The new university mathematics series. . Includes Index. Includes bibliographical reference. 328 328 Subjects--Topical Terms: Differential equations--Analysis.Partial equations. Dewey Class. No.: 515.35 / S62i