TY  - BOOK
AU  - Boyce W. E
TI  - Elementary differiential equations and boundary value problems
SN  - 0471093343
AV  - QA  371  .B63 1977 
PY  - 1977///
CY  - New York
PB  -  John Wiley
KW  - Differiential Equations
ER  -