TY  - BOOK
AU  - Coddington, Earl A.
AU  - Levinson, Norman
TI  - Theory of ordinary differential equations
T2  - International series in pure and applied mathematics 
U1  - 517.382 
PY  - 1955///
CY  - New York
PB  - McGraw-Hill Book Company, Inc.
KW  - Differential equations
ER  -