BOYCE, William E. <br/><br/>
Elementary Differential Equations 

 - 7th Ed, 
 - Washington  John Wiley & Sons, Inc  2003 
 - xvi, 592p. 
<br/><br/><label>ISBN: </label>0-471-30840-4 
<br/><br/><label>Dewey Class. No.: </label>515.35