| Entry Text: | MACLACHLAN, Donald. Room 39: Naval Intelligence in Action 1939–45. xvii, 438p., illus., index. London: Weidenfeld & Nicolson; New York: Atheneum, 1968. ISBN: 0297761153.
A full account, interesting but incomplete, for example in its omission of any discussion of the value of ULTRA, which was still considered secret in 1968. |
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