TY  - BOOK
AU  - Berg, Paul W.
AU  - McGregor, James L.,
TI  - Elementary partial differential equations
T2  - Holden-Day series in mathematics
U1  - 517.383 
PY  - 1966///
CY  - San Francisco
PB  -  Holden-Day
KW  - Differential equations, Partial
ER  -