Subject
Abandoned children
1
Arms race
1
Asian American spies History
1
Atomic bomb
2
Atomic bomb History
2
Bletchley (Buckinghamshire, England) History
1
Bletchley Park (Milton Keynes, England) History
1
Brazil History
1
Cold War
2
Congo (Democratic Republic) Relations
1
Cryptography History
1
Dictators
1
Espionage
1
Espionage History
1
Espionage, American History
1
Espionage, German History
2
Espionage, Soviet History
1
Friends and associates
1
Germany History
2
Great Britain Foreign relations
1
Great Britain History
1
Great Britain Relations
1
History
9
Holocaust, Jewish (1939-1945)
1
Impersonation
1
Intelligence officers
2
Intelligence service
2
Intelligence service History
2
Ireland Foreign relations
1
Japan History
1
Japanese language Political aspects History
1
London (England)
1
Military history
1
Military intelligence History
1
National parks and reserves History
1
Natural history
1
Neutrality History
1
Operation Freshman, 1942
1
Operation Sunrise
1
Police History
1
Presidents
1
Prime ministers
1
Propaganda, American History
1
Sabotage
1
Sabotage History
1
Scientists
1
Secret service
2
Siblings
1
Spies
4
Spies History
1
more ...