Kreider, Donald L. <br/><br/>
Elementary of Differential Equations / 
Donald L. Kreider, Robert G. Kuller, Donald R. Ostberg. 
 - London :  Addison-Wisley  Publishing Co., Inc. ,  c1968. 
 - xiv, 492 p. :  ill. ;  24 cm. 
 - Addison-Wisley Series In mathematics. .
<br/><br/> Includes index. 
<br/><br/><label>Dewey Class. No.: </label>515.35  / KRE