Region
Europe, Eastern
Europe, Eastern --
28
Soviet Union
9
Soviet Union --
9
Europe --
4
Former Soviet republics --
4
Central Europe
3
Asia, Central
2
Europe
2
United States --
2
Asia
1
Asia --
1
China
1
China --
1
Communist countries --
1
Eastern Europe
1
Europe, Eastern - --
1
Europe, Southern
1
European Economic Community countries --
1
European Economic community countries --
1
European Union countries
1
European Union countries --
1
European economic community countries
1
Former Soviet Republics
1
Former Soviet republics
1
Great Britain
1
United States
1