DOS : the complete reference 
Jamsa, Kris. 
 - fourth edition. 
 -  Osborne McGraw-Hill.  1993 
 - xxii, 1121 pages. 
<br/><br/>
<br/><br/><label>ISBN: </label>9-71656046-X 
<br/><br/><label>Dewey Class. No.: </label>001.644 J24d 1993