Cummings 2008, p. 169 Cummings, Richard (2008). "The Ether War: Hostile Intelligence Activities Directed Against Radio Free Europe, Radio Liberty, and the Émigré Community in Munich during the Cold War". Journal of Transatlantic Studies. 6 (2): 168–182. doi:10.1080/14794010802184374. S2CID143544822.
Cummings 2008, p. 170 Cummings, Richard (2008). "The Ether War: Hostile Intelligence Activities Directed Against Radio Free Europe, Radio Liberty, and the Émigré Community in Munich during the Cold War". Journal of Transatlantic Studies. 6 (2): 168–182. doi:10.1080/14794010802184374. S2CID143544822.
Cummings 2008, p. 173 Cummings, Richard (2008). "The Ether War: Hostile Intelligence Activities Directed Against Radio Free Europe, Radio Liberty, and the Émigré Community in Munich during the Cold War". Journal of Transatlantic Studies. 6 (2): 168–182. doi:10.1080/14794010802184374. S2CID143544822.
Cummings 2008, p. 169 Cummings, Richard (2008). "The Ether War: Hostile Intelligence Activities Directed Against Radio Free Europe, Radio Liberty, and the Émigré Community in Munich during the Cold War". Journal of Transatlantic Studies. 6 (2): 168–182. doi:10.1080/14794010802184374. S2CID143544822.
Cummings 2008, p. 170 Cummings, Richard (2008). "The Ether War: Hostile Intelligence Activities Directed Against Radio Free Europe, Radio Liberty, and the Émigré Community in Munich during the Cold War". Journal of Transatlantic Studies. 6 (2): 168–182. doi:10.1080/14794010802184374. S2CID143544822.
Cummings 2008, p. 173 Cummings, Richard (2008). "The Ether War: Hostile Intelligence Activities Directed Against Radio Free Europe, Radio Liberty, and the Émigré Community in Munich during the Cold War". Journal of Transatlantic Studies. 6 (2): 168–182. doi:10.1080/14794010802184374. S2CID143544822.