Courant, R . Methods of methematical physics / R. Courant and D. Hilbert. - New York : John Wiley and Sons , 1953. - xv,560p. : ills. ; 23cm . Include index ISBN: 047017952X USD 122.90 Subjects--Index Terms: METHEMATICAL PHYSICS Dewey Class. No.: 530.15 / COU/M