Hughes, Larry <br/><br/>
Introduction to data communications  a practical approach 
Larry Hughes. 
 - New Delhi  Narosa  1999 
 - xv, 502p., 22cm. 
<br/><br/><label>ISBN: </label>81-7319-179-4. 
<br/><br/><label>Dewey Class. No.: </label>005.71  / H89I