A nova era das telecomunicações / Agência Nacional de Telecomunicações
Legal regulation of telecommunications and information technology / Communication Authority
Relatório : seminário "Telecommunications and postal services in the EU: recent developments and future prospects: Maastricht 1 e 2 de Outubro de 1998 / Instituto das Comunicações de Portugal
Africa telecom : executive summaries / International Telecommunication Union
Green paper on radio spectrum policy [policopiado] : in the context of European Community policies such as telecommunications, broadcasting, transport, and R & D: COM(1998) 596 final / Commission of the European Communities