Boyce, William E. <br/><br/>
Elementary differential equations / 
William E. Boyce, Richard C. DiPrima. 
 - 2nd ed 
 - New York :  J. Wiley & Sons, Inc.,  1969. 
 - xiv, 421, A-35, I-6 p.  ill. 
<br/><br/>Includes bibliogr. references and index 
<br/><br/><label>ISBN: </label>0471093351 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations