John, Fritz, Partial differential equations.- 3rded. / Fritz John ; [editors, Fritz John ... et al.]. - 3d ed. - New Delhi : Narosa Publishing House, 1979. - vii, 198 p. : ill. ; - Applied mathematical sciences ; v. 1 . Includes index. ISBN: 0387903275 Subjects--Topical Terms: Differential equations, Partial. Universal Decimal Class. No.: 517.95 / JOH