
1.		Final acts : of the Regional Administrative Conference for the Planning of VHF/UHF Television Broadcasting Area and Neighbouring Countries: Geneva, 1989 / International Telecommunication Union Data Publicação: 1989 Tema: UIT-União Internacional das Telecomunicações
2.		General aspects of digital transmission systems : terminal equipments: recommendations G.700 - G.795 / International Telecommunication Union Data Publicação: 1989 Tema: Vária
3.		Man-machine language (MML) : recommendation Z.301 - Z.341/International Telecommunication Union Data Publicação: 1989 Tema: Vária
4.		Maintenance of international sound-programme and television transmission circuits : series N recommendations / International Telecommunication Union Data Publicação: 1989 Tema: Vária
5.		Interworking with satellite mobile systems : recommendations Q.1100 - Q.1152 / International Telecommunication Union Data Publicação: 1989 Tema: Vária
6.		Maintenance of international telegraph, phototelegraph and leased circuits : maintenance of the international public telephone network: maintenance of maritime satellite and data transmission systems: recommendations M.800 - M.1375 / International Telecommunication Union Data Publicação: 1989 Tema: Vária
7.		Data communication networks : transmission, signalling and switching, network aspects, maintenance and administrative arrangements: recommendations X.40 - X.181 / International Telecommunication Union Data Publicação: 1989 Tema: Vária
8.		International telecommunication regulations : final acts of the world administrative telegraph and telephone conference: Melbourne, 1988: (WATTC-88) Data Publicação: 1989 Tema: Vária
9.		Data communication networks : open systems interconnection (OSI) protocol specifications, conformance testing: recommendations X.220 - X.290 /International Telecommunication Union Data Publicação: 1989 Tema: Vária
10.		Terminal equipment and protocols for telematic services : recommendations T.0 - T.63 / International Telecommunication Union Data Publicação: 1989 Tema: Vária