TY  - BOOK
AU  - Pontryagin,L.S
AU  - Kacinskas, Leonas (tr.)
TI  - Ordinary differential equations 
U1  - 517.382/POO 
PY  - 0000/// Pergamon
PY  - 1962///
CY  - Lond.
KW  - Equations, theory of
N1  - Includes index and Bibliography and Glossary.
ER  -