Hurewicz, Witold <br/><br/>
Lactures on Ordinary Differential Equations 
/ by Witold Hurewicz 
 - New York:  Dover Publications,  1990. 
 - 122p. 
<br/><br/><label>ISBN: </label>9780486664200 
<br/><br/><label>Dewey Class. No.: </label>515.35  / HUR/L