TY  - BOOK
AU  - Coddington,Earl A
TI  - Theory of ordinary differential equations: Differential equations 
SN  - 9780486659428
U1  - 515.352 
PY  - 1989///
CY  - New York
PB  - Dover Publication
KW  - Differential equations
KW  - Boundary value problems
KW  - Differential equations, Linear
ER  -