Type A Cipher Machine (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Type A Cipher Machine" in English language version.

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archive.org

Budiansky, Stephen (2000). Battle of Wits: The Complete Story of Codebreaking in World War II. New York: The Free Press. pp. 84–88.
Bauer, Friedrich Ludwig (2007). Decrypted Secrets: Methods and Maxims of Cryptology. Springer. pp. 154–158.

books.google.com

Andrew, Christopher (1996). For the President's Eyes Only. HarperCollins. p. 105. ISBN 978-0-06-092178-1. Retrieved 2009-04-21.

nsa.gov

"Pearl Harbor Review - Red and Purple". National Security Agency. Retrieved 2009-04-03.
"Pearl Harbor Review - Early Japanese Systems". National Security Agency. Retrieved 2009-04-03.

quadibloc.com

Savard, John J. G. "The RED Machine". Retrieved 2009-04-21.

worldcat.org

Kahn, David (1967). The Codebreakers: The Story of Secret Writing. New York: The Macmillan Company. ISBN 978-0-684-83130-5. OCLC 59019141