International Directory of Telecommunications :   Market Trends, Companies, Statistics, and Personnel /  
edited Steven Roberts and Tony Hay. 
 - 2nd ed.  
 - United KIngdom :  Longman Group Limited ,  ©1986 . 
 - xv, 345 pages :   26 cm  
<br/><br/> Includes index.  
<br/><br/><label>ISBN: </label>058290207X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication systems--Directories.