New systems and services in telecommunications, II 
/ Proceedings of the International Conference on New Systems and Services in Telecommunications, Liege, Belgium, November 16-18, 1983 
 - Amsterdam:   North-Holland Publishing Company,   1984 
 - x, 470p. 
<br/><br/><label>ISBN: </label>0444875506 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication
<br/><br/><label>Universal Decimal Class. No.: </label>621.39(082.2)  / M4