TY  - BOOK
AU  - Courant R.
AU  - Hilbert D.
TI  - Methods of mathematical physics. Vol. I. Ist English ed. Translated and revised from german original
U1  - 517.958(07) 
PY  - 1953///
CY  - New York-London
PB  - Interscience Publ.
ER  -