Robbins, Judd <br/><br/>
Mastering Dos 6.0 and 6.2  special edition 

 - 2nd ed. 
 - New Delhi  BPB Publications 
 - xxxiv, 1018 p.; 26cm. 
<br/><br/><label>ISBN: </label>8170291318 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Operating system