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- Swedish Signal Intelligence: 1900-1945, Frank Cass Publishers, 2002, ISBN 0-7146-5211-3 In front of your eyes - drawings and comments, Johanneshov, 2010 "Bengt...2 KB (163 words) - 23:05, 12 January 2023
- signal intelligence 1900–1945. London: Frank Cass. pp. 25–28. ISBN 0-7146-5211-3. de Leeuw, Karl Maria Michael; Bergstra, Jan (28 August 2007). The History...4 KB (453 words) - 10:50, 10 June 2024
Cass series—studies in intelligence. London: Frank Cass. p. 256. ISBN 0-7146-5211-3. SELIBR 8622145. Beckman, Bengt; Widman, Kjell-Ove (2002). Codebreakers:...15 KB (1,173 words) - 14:31, 26 April 2024- series—studies in intelligence. London: Frank Cass. pp. 211–212. ISBN 0-7146-5211-3. Personal knowledge. Neil P. Albaugh Parikka Altenstedt, Johanna (2010)...8 KB (851 words) - 07:25, 15 February 2024
series--studies in intelligence. London: Frank Cass. pp. 211–212. ISBN 0-7146-5211-3. Sveriges dödbok 1947-2003 [Swedish death index 1947-2003] (in Swedish)...26 KB (2,087 words) - 07:45, 25 January 2024
