HINSLEY F H (ed.) <br/><br/>
Codebreakers:  the inside story of Bletchley Park 

 - Oxford, U.K.:  Oxford University Press,  1993 
 - 321p. 
<br/><br/> History of GCHQ Bletchley Park during World War 2. Bletchley has been described as the most successful intelligence agency in history. The book was written by some of the people actually involved in this critically important work. The more important pieces of enemy intelligence obtained were given the overall name of Ultra which included decryptions of German Enigma communications. 
<br/><br/><label>ISBN: </label>019285304X (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>BRITAIN<br/>CODE BREAKING<br/>CODES<br/>CRYPTOGRAPHY<br/>ENIGMA PROJECT<br/>MILITARY INTELLIGENCE<br/>SECOND WORLD WAR<br/>SIGNALS INTELLIGENCE