Sumner, John <br/><br/>
Illustrated DR DOS 6:  the first 20 hours / 
by John Sumner 
 - Berks :  Kuma Computers, 
<br/><br/><label>ISBN: </label>0745700446  £19.95 
<br/><br/><label>Subjects--Index Terms: </label>Computer Programming Dr Dos 6 Operating System 
<br/><br/><label>Dewey Class. No.: </label>005.4469