Boyce, William E <br/><br/>
Elementary differential equations and boundary value problems / 
William E. Boyce, Richard C. DiPrima 
 - 6th ed. 
 - New York:  Wiley,  1997 
 - xvi, 749 p. :  col. ill. ;  25 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>0471089559 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations<br/>Boundary value problems