TY  - BOOK
AU  - Pontri͡agin,Lev Semenovich
TI  - A course in ordinary differential equations
AV  - QA372 .P733 1967
U1  - 517/.382 
PY  - 1967///
CY  - Delhi
PB  - Hindustan Pub. Corp. (India)
KW  - Differential equations
ER  -