Stallings, William <br/><br/>
Data and computer communications 
/ by William Stallings 
 - 8th ed. 
 - New Delhi  Pearson education  2007 
 - 834p.;24cm 
<br/><br/><label>ISBN: </label>978-81-317-1536-9 
<br/><br/><label>Dewey Class. No.: </label>004.6  / STA/D