John, Fritz, 1910- Partial differential equations / Fritz John. - 3d ed. - New York : Springer, c1978. - ix, 198 p. : il. - Applied mathematical sciences / Springer-Verlag New York ; v. 1 Applied mathematical sciences ; v. 1 . ISBN: 0387903275 Subjects--Topical Terms: Equações diferenciais parciais. Dewey Class. No.: 515.353