Boyce,William E. <br/><br/>
Elementary differential equations / 
Boyce,William E. 
 - 7th ed. 
 - New York:  John Wiley,  2000. 
 - xvi,592p;26cm 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0471319988 
<br/><br/><label>Dewey Class. No.: </label>515.35 DIP