Courant,R. Methods of mathematical physics, by R.Courant and D.Hilbert.Translated and Revised from the German Original - New York John Wiley & Sons 1989 - v. 24cm. v.2 :Partial differential equations ISBN: 0471504475 Subjects--Topical Terms: Physics-MathematicsPhysics-Statistical Methods Dewey Class. No.: 530.15 / COU