Region
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Asia, Central
3
Caribbean Area
3
Developed countries
3
Egypt
3
Europe, Central
3
Germany (East)
3
Hiroshima-shi (Japan)
3
Hungary
3
Iraq
3
Netherlands
3
Rome
3
Southern States
3
20th century
2
Africa, North
2
Algeria
2
Arab countries
2
Balkan Peninsula
2
Belize
2
Berlin (Germany)
2
Black Sea Region
2
Bosnia and Herzegovina
2
Brazil
2
Bulgaria
2
Cambodia
2
England
2
English-speaking countries
2
Greece
2
History
2
Indonesia
2
Libya
2
Mediterranean Region
2
Outer space
2
Persian Gulf Region
2
South Africa
2
Sweden
2
Taiwan
2
URSS
2
Ukraine
2
1945-1955
1
19th century
1
Africa, Southern
1
America
1
Argentina
1
Atlantic Ocean
1
Bolivia
1
Caribbean, English-speaking
1
Caspian Sea Region
1
Caucasus
1
Chile
1
Colombia
1
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