International directory of telecommunications  market trends, companies, statistics, products, and personnel 
consultant editor, Steven Roberts 
 - Harlow, Essex, UK  Longman  1984 
 - xv, 282 p.  ill  26 cm. 
 - Companion for industry .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication--Directories<br/>Broadcasting--Directories<br/>Telecommunication equipment industry--Directories