Hinsley, Francis Harry. British Intelligence in the Second World War. Vol. 3. Cambridge University Press, 1979.
Hinsley - 1979 - British intelligence in the second world war.pdf (91.8 MB)
Jones, Reginald Victor. Most Secret War. Penguin UK, 2009.
Jones - 2009 - Most secret war.pdf (58.0 MB)
The Secret War Video (UNCUT):
Eckersley, TL. “Multiple Signals in Short-Wave Transmission.” Proceedings of the Institute of Radio Engineers 18, no. 1 (1930): 106–22.
Eckersley - 1930 - Multiple signals in short-wave transmission.pdf (2.8 MB)
Bernhard station Be-9.pdf|attachment (16.2 MB)
Bernhard ground station.pdf|attachment (75.4 MB)
Eckersley, TL. “Ultra-Short-Wave Refraction and Diffraction.” Journal of the Institution of Electrical Engineers 80, no. 483 (1937): 286–304.
[Eckersley-19370005.pdf|attachment]
(upload://bBpRDJLpZ5611cusDF8bP4HZUi2.pdf) (1.4 MB)
