Schildt, Herbert. <br/><br/>
DOS 4 made easy / 
Herbert Schildt. 
 - Berkeley, Calif. :  Osborne McGraw-Hill,  c1988. 
 - xiii, 346 p. :  ill. 
<br/><br/><label>ISBN: </label>0078814480 
<br/><br/><label>LCCN: </label>90045055     
<br/><br/><label>Subjects--Topical Terms: </label><br/>DOS 4 (Computer operating system)