TY  - BOOK
AU  - Powers,David L.
TI  - Boundary value problems
SN  - 0125637500
AV  - QA374 .P68
U1  - 515/.35 
PY  - 1972///]
CY  - New York
PB  - Academic Press
KW  - Boundary value problems
KW  - Local
KW  - Differential equations, Partial
N1  - Bibliography: p. 216-217
ER  -