O'Day, Kate. <br/><br/>
Understanding MS-DOS / 
the Waite Group, Kate O'Day; John Angermeyer and Harry Henderson. 
 - 2nd ed. 
 - Carmel, Ind., USA :  H.W. Sams,  1989. 
 - Sams understanding series .
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0672272989 (pbk.) 
<br/><br/><label>LCCN: </label>89637123  
<br/><br/><label>Dewey Class. No.: </label>00642  / O'DA