UNIX/  concepts and applications 
Das,Sumitabha 
 - 4th 
 - New Delhi:  Tata Mcgraw Hill Private Limited,  2006. 
 - 671 
<br/><br/><label>ISBN: </label>9780070635463 
<br/><br/><label>Dewey Class. No.: </label>005.13  / DAS/U