Rainville, Earl D. <br/><br/>
Elementary differential equations / 
Earl D. Rainville, Phillip E. Bedient. 
 - 6th edition. 
 - New York :  McMillan Publishing Company, Incorporated,  c1981. 
 - xiv, 529 pages :  Illustration ;  21 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>9710821911