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- History181
- World War, 1939-194546
- Foreign relations26
- World War, 1914-191826
- Politics and government23
- Germans20
- Prisoners of war14
- Secret service12
- Political refugees11
- Prisoners and prisons, German10
- Causes9
- History and criticism9
- Military intelligence9
- Refugees9
- Social conditions9
- Emigration and immigration8
- Foreign public opinion, British8
- Jews8
- Public opinion8
- Espionage, German7