Masterman, J. C.  1891- <br/><br/>
The double-cross system :  in the war of 1939 to 1945 / 
by J. C. Masterman 
 - London :  Yale University Press,  c1972 
 - xix, 203 p. ;  22 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>0300014961 :  PND 4.40 
<br/><br/><label>Subjects--Topical Terms: </label><br/>World War, 1939-1945--Secret service--Great Britain
<br/><br/><label>Dewey Class. No.: </label>940.548642