Das <br/><br/>
Unix Concepts and Applications 

 - 4th ed. 
 - New Delhi  Tata McGrawhill Pvt.ltd  2007 
 - xxi+671p 
<br/><br/><label>ISBN: </label>9780070635463 
<br/><br/><label>Dewey Class. No.: </label>005.432 DAS 4;41