Cookridge, E H   <br/><br/>
Spy trade / 
by E.H. Cookridge. 
 - New York :  Walker,  1971. 
 - 288 pages :  ill. ;  22 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0802703860 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Spies