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AMT/C/30
Xerox TS, 'Treatise on the Enigma'. c. 1939-42. Part of the records of the National Security Agency transferred to US National Archives and Records Administration in Apr. 1995.
Paper, 61 sh. in envelope.
Keywords: Enigma; 'Treatise on the Enigma'
Provenance: received from Mr L. Gladwin in 1996-9
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