Held, Gilbert . <br/><br/>
Understanding data communications /  
edited by Gilbert Held. 
 - New Delhi :   Techmedia ,   1996. 
 - xviii,505,20p. :   ills.,tables,charts ;   24cm  CD .  
<br/><br/>Includes glossary and index 
<br/><br/><label>ISBN: </label>8176350664  RS.150 
<br/><br/><label>Subjects--Index Terms: </label>DATA COMMUNICATION 
<br/><br/><label>Dewey Class. No.: </label>004.6  / HEL/U