World War I cryptography (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "World War I cryptography" in English language version.

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books.google.com

Kahn, David (1982). "In Memoriam: Georges-Jean Painvain". Cryptologia. 6 (2): 120–127. doi:10.1080/0161-118291856939.

Lerner, Adrienne. "World War I". Espionage Information: Encyclopedia of Espionage, Intelligence, and Security. Advameg, Inc. Retrieved 27 March 2015.

Flicke, Wilhelm. "The Beginnings of Radio Intercept in World War I" (PDF). National Security Agency.

Walker, Julian (2014-07-23). "Trench talk: a guide to first world war slang". The Guardian. ISSN 0261-3077. Retrieved 2019-04-17.

Walker, Julian (2014-07-23). "Trench talk: a guide to first world war slang". The Guardian. ISSN 0261-3077. Retrieved 2019-04-17.