TY  - BOOK
AU  - Coddington,Earl A.
AU  - Levinson,Norman levinson
TI  - Theory of ordinary differential equations
SN  - 9780070992566
U1  - 517.38 COD L 
PY  - 1955///
CY  - New York, 
PB  - McGraw-Hill, 
KW  - Differential equations
ER  -