Thomas, Robet M. <br/><br/>
DOS 5 Instant reference 

 - Delhi  BPB Publications  1992 
 - xx,316  Pb 
<br/><br/> General rules for using DOS 
<br/><br/><label>ISBN: </label>81-7029-239-5 
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>
<br/><br/><label>Dewey Class. No.: </label>005.4(DOS)