Stallings, william.  <br/><br/>
Data and computer communications / William Stallings. 

<br/><br/><label>ISBN: </label>0029461723 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Data transmission systems. 
<br/><br/><label>Dewey Class. No.: </label>004.6 STA