Series SA 1997 : space applications and meteorology: supplement 2 to volume 1997 SA series / International Telecommunication Union. Radiocommunication Bureau
BO.1227-2- satellite-broadcasting systems of integrated services digital broadcasting
Spectrum management : supplement 2 to volume 1997 SM Series / ITU-R
Spectrum management : supplement 4 to volume 1997 SM Series / International Telecommunication Union