TY  - BOOK
AU  - Duff,G.F.D.
TI  - Partial differential equations
T2  - Mathematical expositions
AV  - QA377 .D8 1981
U1  - 517.38 
PY  - 1956///
CY  - Toronto
PB  - University of Toronto Press
KW  - Differential equations, Partial
KW  - fast
N1  - Includes bibliographical references (pages 244-245) and index; Photocopy; Ann Arbor, Mich.; University Microfilms International; 1981
ER  -