Cable engineering for local area networks / Barry J. Elliott
Spectrum management : supplement 4 to volume 1997 SM Series / International Telecommunication Union
Strategy for the future use of the radio spectrum in the UK [texto policopiado] / Radiocommunications Agency
Spectrum management : recommendation ITU-R SM. 1413 radiocommunication data dictionary: supplement 3 to volume 1997 SM Series / ITU-R