TY  - BOOK
AU  - Powers, David L
TI  - Boundary value problems 
SN  - 0125637349
U1  - 515.353 
PY  - 1999///
CY  - Boston 
PB  - Harcourt academic Press 
KW  - Differential equations,partial
KW  - Differential equations,ordianary
KW  - Calculus
ER  -