Communication technology update  

 - 3rd ed. 
 - Boston:   Butterworth -Heineman,   1994 
 - v, 389p. 
<br/><br/><label>ISBN: </label>0-7506-9593-5 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Communication 
<br/><br/><label>Subjects--Index Terms: </label>Technology  
<br/><br/><label>Universal Decimal Class. No.: </label>621.39+681.3  / N4