Zill  <br/><br/>
A first course in differential equations  
/ Dennis G. Zill. 
 - The classic 5th ed.. 
 -  [year of publication not identified] 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>0534373887  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations
<br/><br/><label>Dewey Class. No.: </label>515.35 ZIL 2001