Ritehie, C. <br/><br/>
Operating systems  incorporating UNIX and MS-DOS 

 - 2nd ed.  
 - London  DP Publication Ltd  1995 
 - viii, : 232p. : 28cm.  
<br/><br/> Includes bibliographical refrences and index  
<br/><br/><label>Dewey Class. No.: </label>001.642 RIT