Why is it that in over 30 years, the phenomenon of Numbers Stations has gone almost totally unreported? What are the agencies behind the Numbers Stations, and why are the eastern European stations still on the air? Why does the Czech republic operate a Numbers Station 24 hours a day? How is it that Numbers Stations are allowed to interfere with essential radio services like air traffic control and shipping without having to answer to anybody? Why does the Swedish Rhapsody Numbers Station use a small girls voice?
These are just some of the questions that remain unanswered.
Wikipedia en: “Numbers station”.
Wikipedia en: “UVB-76.”
Wired, Peter Savodnik: “Inside the Russian Short Wave Radio Enigma”.