UIT-R recommendations [CD-ROM] / International Telecommunication Union; Radiocommunication Bureau
Spectrum utilization and monitoring : reports of the CCIR, 1990: (also decisions): annex to volume I / International Telecommunication Union
Fixed service at frequences below about 30 Mhz : reports of the CCIR, 1990: (also decisions): annex to volume III / International Telecommunication Union
Fixed-satellite service : reports of the CCIR, 1990: (also decisions): annex to volume IV - part 1 / International Telecommunication Union