Welchman, Gordon. <br/><br/>
The Hut Six story :  breaking the Enigma codes / 
Gordon Welchman. 
 - New York:  McGraw-Hill,  c1982. 
 - ix, 326 p. :  ill. ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/>Bibliography: p. 315-317. 
<br/><br/><label>ISBN: </label>0070691800 
<br/><br/><label>LCCN: </label>81013657  
<br/><br/><label>Subjects--Personal Names: </label><br/>Welchman, Gordon.
<br/><br/><label>Subjects--Topical Terms: </label><br/>World War, 1939-1945--Cryptography.<br/>World War, 1939-1945--Secret service--Great Britain.<br/>World War, 1939-1945--Personal narratives, British.
<br/><br/><label>Subjects--Index Terms: </label>World War, 1939-1945 -- Personal narratives, British. 
<br/><br/><label>LC Class. No.: </label>D810.C88  / W44 
<br/><br/><label>Dewey Class. No.: </label>940.54/86/41