Sin autor <br/><br/>
Microsoft MS-DOS user's guide : Operating system Version 3.3 

 - Redmond :  [S.n.],  c1988 
 - vii, 386 p. : il. ;  23 cm. 
<br/><br/> Documento no. 018812-24-54. 
<br/><br/><label>Standard No.: </label>DIF-M2009 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MS DOS