1.		Spectrum utilization and monitoring : recommendations of the CCIR, 1990: (also resolutions and options): volume I / International Telecommunication Union Data Publicação: 1990 Tema: Radiocomunicações
2.		Space research and radioastronomy services : recommendations of the CCIR, 1990: (also and resolutions and opinions): volume II / International Telecommunication Union Data Publicação: 1990 Tema: Radiocomunicações
3.		Fixed service at frequences below about 30 Mhz : recommendations of the CCIR, 1990: (also and resolutions and opinions): volume III / International Telecommunication Union Data Publicação: 1990 Tema: Radiocomunicações
4.		Fixed-satellite service : recommendations of the CCIR, 1990: (also and resolutions and opinions): volume IV - part 1 / International Telecommunication Union Data Publicação: 1990 Tema: Radiocomunicações
5.		XVIIth Plenary Assembly, Dusseldorf : recommendations of the CCIR: / International Telecommunication Union Data Publicação: 1990 Tema: Radiocomunicações
6.		Propagation in non-ionized media : recommendations of the CCIR, 1990: (also and resolutions and opinions): volume V / International Telecommunication Union Data Publicação: 1990 Tema: Radiocomunicações
7.		Propagation in ionized media : recommendations of the CCIR, 1990: (also and resolutions and opinions): volume VI / International Telecommunication Union Data Publicação: 1990 Tema: Radiocomunicações
8.		Standard frequencies and time signals : recommendations of the CCIR, 1990: (also and resolutions and opinions): volume VII / International Telecommunication Union Data Publicação: 1990 Tema: Radiocomunicações
9.		Mobile, radiodetermination, amateur and related satellite services : recommendations of the CCIR, 1990: (also and resolutions and opinions): volume VIII / International Telecommunication Union Data Publicação: 1990 Tema: Radiocomunicações
10.		Fixed service using radio-relay systems : recommendations of the CCIR, 1990: (also and resolutions and opinions): volume IX - part 1 / International Telecommunication Union Data Publicação: 1990 Tema: Radiocomunicações
11.		Broadcasting service (sound) : recommendations of the CCIR, 1990: (also and resolutions and opinions): volume X - part 1 / International Telecommunication Union Data Publicação: 1990 Tema: Radiocomunicações
12.		Broadcasting-satellite service (sound and television) : recommendations of the CCIR, 1990: (also and resolutions and opinions): volume X and XI- part 2 / International Telecommunication Union Data Publicação: 1990 Tema: Radiocomunicações