Stallings, W <br/><br/>
Data and computer communications / 
Stallings, W. 
 - 4 th ed 
 - New Delhi:  Prentice Hall of India,  1996. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>81203090106512 
<br/><br/><label>Dewey Class. No.: </label>005.71 STA