2015 Shortwave frequency guide : worldwide broadcast and utility radio stations / ed. Klingenfuss Publications
The 2015 super frequency list : broadcast and utility / ed. Klingenfuss Publications
2015/2016 Guide to utility radio stations : professional HF communication today / ed. Klingenfuss Publications
International communications market report 2014 [documento eletrónico] / Office of Communications
List of ship stations and maritime mobile service identity assignments / International Telecommunication Union
New approaches to spectrum management [documento eletrónico] / Organisation for Economic co-Operation and Development
CISPR 16-1-2 [documento eletrónico] : specification for radio disturbance and immunity measuring apparatus and methods; : part 1-2; : radio disturbance and immunity measuring apparatus – Coupling devices for conducted disturbance measurements / International Electrotechnical Commission