Rainvilee, Earl D. <br/><br/>
Elementary differential equations 
Eral D. rainville, Philip E. Bedient. 
 - Seventh edition. 
 - New York:  Macmillan Publishing Company;  [1981] 
 - xiii, 546 pages:  with illustrations;  24 cm. 
<br/><br/>Includes index 
<br/><br/><label>ISBN: </label>971105552X 
<br/><br/><label>LC Class. No.: </label>QA 465  / .R159 1981