TY  - BOOK
AU  - Tychonov,A.N.
AU  - Samarski,A.A.
TI  - Partial differential equations of mathematical physics
U1  - 517.383 
PY  - 1967///
CY  - San Francisco
PB  - Holden-Day
KW  - Differential equations
KW  - Mathematical physics
ER  -