Ashley, R. <br/><br/>
Dos :  self teaching guide. 

 - New York :  John Wiley,  1993. 
 - xxi, 378 pages illustrations. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0471590746 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Operating systems.