Schmitz, Ruth. <br/><br/>
Practical DOS! / 
Ruth Schmitz. 
 - 2nd ed. 
 - New York :  Mitchell McGraw-Hill,  1992. 
 - xvi, 352 p. :  ill. ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0078320348 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Operating systems (Computers)