Ross, Shepley L. <br/><br/>
Introduction to Ordinary Differential Equations 

 -  4th ed. 
 - New York    John Wiley & sons   c1989. 
 - xi, 609 p. 
<br/><br/><label>ISBN: </label>0471098817 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations.
<br/><br/><label>LC Class. No.: </label>QA372 .R815