Beesly Patrick  1913 <br/><br/>
Very special intelligence :  the story of the Admiralty's Operational Intelligence Centre, 1939-1945 / 
Patrick Beesly ; with a new introduction by W.J.R.  Gardner and a new afterword by Ralph Erskine. 
 - London :  Mechanicsburg, PA :  Greenhill Books ;  Stackpole Books,  2000. 
 - xxiv, 296 p. ;  23 cm. 
<br/><br/>Includes bibliographical references (p. 285-289) and index. 
<br/><br/><label>ISBN: </label>1853673986 
<br/><br/><label>Subjects--Corporate Names: </label><br/>Great Britain Naval Intelligence Division  Operational Intelligence Centre 
<br/><br/><label>Subjects--Topical Terms: </label><br/>World War 19391945--Cryptography<br/>Military intelligence--History--Great Britain--20th century
<br/><br/><label>LC Class. No.: </label>D810.S7 
<br/><br/><label>Dewey Class. No.: </label>940.54/8641