
1.		Maintenance of international sound-programme and television transmission circuits : series N recommendations / International Telecommunication Union Data Publicação: 1989 Tema: Vária
2.		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

Maintenance of international sound-programme and television transmission circuits : series N recommendations / International Telecommunication Union

Data Publicação: 1989 Tema: Vária

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