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Subject (Region)
- Belgium[remove]28
- Romania[remove]28
- France23
- Great Britain23
- Italy23
- Germany (to 1949; 1990- )20
- Poland20
- Czechoslovakia19
- Yugoslavia19
- Japan17
- Greece15
- Turkey15
- Bulgaria13
- Hungary13
- Russia (to 1921)13
- Austria12
- Cuba12
- Austria-Hungary (1867-1918)11
- Portugal11
- China10