1.		Sound and television recording : recommendations of the CCIR, 1990: (also and resolutions and opinions): volume X and XI- part 3 / International Telecommunication Union Data Publicação: 1990 Tema: Radiocomunicações
2.		Television and sound transmission (CMTT) : recommendations of the CCIR, 1990: (also resolutions and options): volume XII / International Telecommunication Union Data Publicação: 1990 Tema: Radiocomunicações
3.		Sound and television recording : reports of the CCIR, 1990: (also decisions): annex to volumes X and XI- part 3 / International Telecommunication Union Data Publicação: 1990 Tema: Radiocomunicações
4.		Television and sound transmission (CMTT) : reports of the CCIR, 1990: (also decisions): annex to volume XII / International Telecommunication Union Data Publicação: 1990 Tema: Radiocomunicações