TY  - BOOK
AU  - Kaplan Wilfred
TI  - Elements of ordinary differential equations
T2  - Addison-Wesley Series in Mathematics
U1  - B33, K4 
PY  - 1964///
CY  - London
PB  - Addison-Wesley-Publishing          
KW  - Equations
N1  - Bibliography at the end of each chapter
ER  -