Spectrum management : supplement 1 to volume 2000 SM Series: parts 1 and 2 / International Telecommunication Union
Spectrum management : recommendation ITU-R SM. 1413 radiocommunication data dictionary: supplement 3 to volume 1997 SM Series / ITU-R
1997 SNG Series : satellite news gathering: recommendations / International Telecommunication Union
1995 TF series : time signals and frequency standards emissions: ITU-R recommendations (new and revised as of 21 October 1995) / International Telecommunication Union