TY  - BOOK
AU  - Coddington,Earl A.
AU  - Levinson,Norman
TI  - Theory of ordinary differential equations
T2  - International series in pure and applied mathematics
AV  - QA372 .C6 1955 
U1  - 517.38 
PY  - 1955///
CY  - New York
PB  - McGraw-Hill
KW  - Differential equations
ER  -