Pontryagin, L. S.  1908-1988. <br/><br/>
Ordinary differential equations / 
L S Pontryagin; Translated from the Russian by Leonas Kacinskas and Walter B. Counts. 
 - Reading, Mass. :  Addison-Wesley Pub. Co.,  c1962. 
 - vi, 298 p. :  illus. ;  24 cm. 
 - Adiwes international series in mathematics .
 - Adiwes international series in mathematics. .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations.
<br/><br/><label>Dewey Class. No.: </label>515.35  / POO 1962