TY  - BOOK
AU  - Duff,G.F.D.
TI  - Partial differential equations
U1  - 517.38 
PY  - 1956/// [Reprinted 1962]
CY  - Toronto
PB  - University of Toronto Press
KW  - Differential equations, Partial
N1  - Includes index; Bibliography: p. [244]-245
ER  -