G. Held <br/><br/>
Understanding Data Communications 

 - 7th 
 - New Delhi  Pearson Education  2003 
 - 765 
<br/><br/><label>ISBN: </label>8129702118 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computers
<br/><br/><label>Dewey Class. No.: </label>105.23