Spectrum utilization and monitoring : recommendations of the CCIR, 1990: (also resolutions and options): volume I / International Telecommunication Union
Space research and radioastronomy services : recommendations of the CCIR, 1990: (also and resolutions and opinions): volume II / International Telecommunication Union
Fixed service at frequences below about 30 Mhz : recommendations of the CCIR, 1990: (also and resolutions and opinions): volume III / International Telecommunication Union
Fixed-satellite service : recommendations of the CCIR, 1990: (also and resolutions and opinions): volume IV - part 1 / International Telecommunication Union
XVIIth Plenary Assembly, Dusseldorf : recommendations of the CCIR: / International Telecommunication Union
Propagation in non-ionized media : recommendations of the CCIR, 1990: (also and resolutions and opinions): volume V / International Telecommunication Union
Propagation in ionized media : recommendations of the CCIR, 1990: (also and resolutions and opinions): volume VI / International Telecommunication Union
Standard frequencies and time signals : recommendations of the CCIR, 1990: (also and resolutions and opinions): volume VII / International Telecommunication Union
Mobile, radiodetermination, amateur and related satellite services : recommendations of the CCIR, 1990: (also and resolutions and opinions): volume VIII / International Telecommunication Union
Fixed service using radio-relay systems : recommendations of the CCIR, 1990: (also and resolutions and opinions): volume IX - part 1 / International Telecommunication Union
Broadcasting service (sound) : recommendations of the CCIR, 1990: (also and resolutions and opinions): volume X - part 1 / International Telecommunication Union
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