TY  - BOOK
AU  - Boyce, William E.
AU  - 
TI  - Elementary differential equations and boundary value problems
SN  - 0-471-31999-6
U1  - 517.94 
PY  - 2001///
CY  - New York
PB  - John Wiley
KW  - Differential equations
KW  - Boundary value problems
ER  -