Rainville, Earl D.  <br/><br/>
Elementary differential equations 
/ by Earl D. Rainville & Phillip E. Bedient 
 - 7th ed. 
 - new york  Macmillan publishing  1981 
 - 546p. 
<br/><br/><label>Dewey Class. No.: </label>515.35  / RAI/E