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Memo: Agreement Between British Government Code and Cipher School and US War Department in Regard to Certain Special Intelligence

US War Department, Joseph T. McNapney (Deputy Chief of Staff) to Chief of Staff, document with attachment, 12 pages, 10 Jun 1943.
Published by Unredacted on 28 Apr 2025. Source: US National Security Agency, released 7 Apr 2010.
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US War Department, Memo: Agreement Between British Government Code and Cipher School and US War Department in Regard to Certain Special Intelligence, Joseph T. McNapney (Deputy Chief of Staff) to Chief of Staff, 10 Jun 1943.