
1.		International telecommunication regulations : final acts of the world administrative telegraph and telephone conference: Melbourne, 1988: (WATTC-88) Data Publicação: 1989 Tema: Vária
2.		Report of the administrative council to the plenipotenciary conference (Nice 1989) / org. International Telecommunication Union Data Publicação: 1989 Tema: UIT-União Internacional das Telecomunicações
3.		Report of the administrative council to the plenipotenciary conference : section 5.2.1: Nice 1989 / International Telecommunication Union Data Publicação: 1989 Tema: UIT-União Internacional das Telecomunicações
4.		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