Mai, Kelmens. <br/><br/>
DOS 5.0 essentials / 
by Kelmens Mai. 
 - Grand Rapids, MI :  Abacus,  c1991. 
 - vi, 233 p. :  ill. 
<br/><br/> "A Data Becker book." 
<br/><br/><label>ISBN: </label>1557551154  
<br/><br/><label>Subjects--Uniform Titles: </label><br/>MS-DOS (Computer file)
<br/><br/><label>Subjects--Topical Terms: </label><br/>Operating systems (Computers)