Haldane Robert A <br/><br/>
The hidden war / 
R. A. Haldane 
 - New York :  St. Martin's Press,  1978 
 - 224 p., [4] leaves of plates :  ill. ;  23 cm 
<br/><br/> Includes index 
<br/><br/>Bibliography: p. [198]-202 
<br/><br/><label>ISBN: </label>0312371977 0709164866  
<br/><br/><label>Subjects--Topical Terms: </label><br/>World War 19391945--Cryptography<br/>World War 19391945--Secret service
<br/><br/><label>LC Class. No.: </label>D810.C88 
<br/><br/><label>Dewey Class. No.: </label>940.54/88