Etgen, Garrest J.  <br/><br/>
A Introduction to Ordinary Differential Equations   with difference equations numerical methods and applications  
/ by Garrest J. Etgen  
 - New York   Harper& Row, Publishers   1977 
 - x, 517p.  
<br/><br/><label>ISBN: </label>0-06-041913-X 
<br/><br/><label>Dewey Class. No.: </label>515.352  / ETG/A