TY  - BOOK
AU  - Boyce, William E  .
TI  - Elementary differential equations and boundary value problems / 
SN  - 0-471-30789-0
U1  - B331 
PY  - 2001///
CY  - New York : 
PB  - John Wiley & Sons, Inc. , 
KW  - Differential equations
ER  -