Panko, Raymond R <br/><br/>
Business data networks and telecommunications 
Raymond R. Panko. 
 - 4th ed. 
 - New Delhi  Prentice Hall of India  2002 
 - xxix, 510p.: ill.; 24cm. 
<br/><br/><label>ISBN: </label>81-203-2171-5. 
<br/><br/><label>Dewey Class. No.: </label>658.45  / P14B