Black, Uyless. <br/><br/>
Data networks : concepts, theory, and practice  
Uyless Black. 
 - Englewood Cliff  Prentice Hall,  1989. 
 - 877 p.  24 cm. 
<br/><br/><label>ISBN: </label>0131984667 (hardcover)  $86.00 9780131984660 (hardcover) 
<br/><br/><label>Source: </label> 395.00 PKR