BOYCE, William E. <br/><br/>
Elementary Differential Equations and Boundary Value Problems 

 - 3rd 
 - New York  John Wiley & Sons  1977 
 - xiv, 582p. 
<br/><br/><label>ISBN: </label>0471093343 
<br/><br/><label>LC Class. No.: </label>QA371  / .B69