Kelley Walter G <br/><br/>
The theory of differential equations :  classical and qualitative / 
Walter Kelley, Allan Peterson. 
 - Upper Saddle River, N.J. :  Prentice Education,  2004. 
 - xi, 413 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references (p. 405-407) and index. 
<br/><br/><label>ISBN: </label>0131020269 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations
<br/><br/><label>LC Class. No.: </label>QA431 
<br/><br/><label>Dewey Class. No.: </label>515/.35