Boyce, William E. <br/><br/>
Elementary differential equations / 
William E. Boyce 
 - 4th.ed. 
 - New York :  John Wiley & Sons,  1986 
 - 512 p. ;  24 cm. 
<br/><br/><label>ISBN: </label>0471078948 
<br/><br/><label>Subjects--Personal Names: </label><br/>DiPrima, Richard
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations