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Subject (Region)
- Poland[remove]78
- Soviet Union (1922-1991)[remove]78
- Czechoslovakia37
- Great Britain35
- Germany (to 1949; 1990- )34
- Romania34
- Yugoslavia34
- Hungary32
- Italy30
- France29
- China24
- Spain24
- Austria22
- Bulgaria22
- Europe20
- Greece19
- Netherlands19
- Albania17
- Japan17
- Norway17