Ferdinand Voegele (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Ferdinand Voegele" in English language version.

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1docs.google.com

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1books.google.com

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books.google.com

Christian Jennings (23 October 2018). The Third Reich is Listening: Inside German codebreaking 1939–45. Bloomsbury USA. p. 351. ISBN 978-1-4728-2950-4. Retrieved 24 November 2020.

docs.google.com

"IF-175 Searbourne Report Vol XIII" (PDF). TICOM. Retrieved 11 March 2017. This article incorporates text from this source, which is in the public domain.

doi.org

Alvarez, David (9 January 2008). "Diplomatic solutions: German foreign office cryptanalysis, 1919–1945". International Journal of Intelligence and CounterIntelligence. 9 (2): 169–185. doi:10.1080/08850609608435314.