Held,Gilbert. <br/><br/>
Data and Computer Communications :  Terms, Definitions and Abbrevation / 
Gilbert,Held. 
 - Chirchester :  John Wiley & Sons,  c1989. 
 - 7860 p.:  [26] 
<br/><br/><label>ISBN: </label>0471920665 
<br/><br/><label>Dewey Class. No.: </label>621.380413  / HEL/DAT