Subject Region
Europe, Eastern
340
Russia (Federation)
194
Former Soviet republics
95
Europe, Central
70
Europe
58
Poland
40
Hungary
38
Soviet Union
36
Former communist countries
32
Romania
29
Asia, Central
28
China
28
United States
23
Czech Republic
21
Germany
19
Germany (East)
15
Bulgaria
14
Ukraine
14
Czechoslovakia
11
Kyrgyzstan
11
Balkan Peninsula
9
Asia
8
Baltic States
7
Georgia (Republic)
7
Slovakia
7
Estonia
6
Former Yugoslav republics
6
Latvia
6
Turkey
6
Albania
5
Belarus
5
Croatia
5
Cuba
5
Developing countries
5
European Union countries
5
Kazakhstan
5
Mongolia
5
Russia
5
Tajikistan
5
Yugoslavia
5
Caucasus
4
Communist countries
4
Moscow (Russia)
4
Serbia
4
Slovenia
4
Uzbekistan
4
Ajaria
3
Ajaria (Georgia)
3
Aral Sea Watershed (Uzbekistan and Kazakhstan)
3
Azerbaijan
3
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