TY  - BOOK
AU  - Coddington, E. A. and Levinson, N.
AU  - Levinson, N. ; jt. auth.
TI  - Theory of ordinary differential equations
T2  - International series in Pure and Applied Mathematics
U1  - 515.35 
PY  - 1955///
CY  - New York
PB  - McGraw-Hill
ER  -