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	1.		Codebreakers : the inside story of Bletchley park F H Hinsley; Alan Stripp by Hinsley, F H Stripp, Alan Publication details: Oxford Oxford University Press 2001 Availability: Items available for loan: Anna Centenary Library (1)Call number: 940.5486 HIN.
	2.		Colossus : the secrets of Bletchley park's codebreaking computers edited by B Jack Copeland by Copeland, B Jack Publication details: Oxford 2010 Availability: Items available for loan: Anna Centenary Library (1)Call number: 940.548641 COP.
	3.		Delusions of intelligence : Enigma, Ultra and the end of secure ciphers R. A. Ratcliff by Ratcliff, R. A Publication details: Cambridge ; New York Cambridge University Press 2006 Availability: Items available for loan: Anna Centenary Library (2)Call number: 940.548743 RAT, ...

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