TY  - GEN
AU  - Duff,G.F.D.
TI  - Differential equations of applied mathematics
SN  - 471223670
AV  - QA377  
U1  - 530.157383 
PY  - 1966///
CY  - New York, 
PB  - Wiley
KW  - Differential equations Partial
N1  - Bibliography: p. 417-418
ER  -