TY  - BOOK
AU  - Berg, Paul W.
AU  - Mcgregor, James L.
TI  - Elementary Partial Differential Equations 
U1  - 515.353 
PY  - 1966///
CY  - San Francisco : 
PB  - Holden Day, 
KW  - Partial Differential Equations
N1  - NN
ER  -