Hansen, Per Brinch. <br/><br/>
Operating system principle /  

 - 1st edn /  
 - New Delhi :   Prentice Hall of India ,   1979 
 - 366p :  
<br/><br/><label>ISBN: </label>0-87692-135-7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer
<br/><br/><label>Dewey Class. No.: </label>Bvk  / L3;4