TY  - BOOK
AU  - Boyce William , E.
TI  - Elementary Differential Equations
SN  - 0-471-0853-2
U1  - 515.35 
PY  - 1997///
CY  - New York
PB  - John Wiley & Sons
KW  - Economics
KW  - Linear Equations  , Separable Equations
ER  -