Ratcliff, R.A. <br/><br/>
Delusions of intelligence :  Enigma, ultra and the end of secure ciphers 

 - Cambridge :  Cambridge Univ. Press,  2006 
 - XVII, 314 S. 
<br/><br/><label>ISBN: </label>9780521736626 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Spionage<br/>Zweiter Weltkrieg<br/>Kryptographie<br/>Dechiffrierung<br/>Weltkrieg (1939-1945)