Held, Gilbert, <br/><br/>
Understanding data Communications 
By Gilbert Held 
 - 7th ed. 
 - New Delhi  Pearson  2008 
 - xv765p.:  24cm. 
<br/><br/><label>ISBN: </label>9788131708729 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Understanding data Communications<br/>Civil Engineering
<br/><br/><label>Dewey Class. No.: </label>004.6