TY  - BOOK
AU  - Friedman, Avner
AU  - 
TI  - Partial differential equations
U1  - 517.95 
PY  - 1969///
CY  - 
PB  - New York
KW  - Functional equations
KW  - Linear equations
KW  - Partial differential equations
KW  - Dynamical systems
ER  -