Ross, Shepley L. <br/><br/>
Introduction to ordinary differential equations / 
Shepley L. Ross 
 - 3rd ed. 
 - New York :  Wiley,  1980 
 - 503 p. ;  26 cm. 
<br/><br/><label>ISBN: </label>0471032956 
<br/><br/><label>LCCN: </label>79-012800 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations