Ayres, Frank <br/><br/>
Theory and problems of differential equations  In SI metric units 

 - 1st ed 
 - McGraw - Hill, New York  1981 
 - 295p 
<br/><br/><label>ISBN: </label>0-07-0990069 
<br/><br/><label>Dewey Class. No.: </label>517.38 Ayr