Geographic Subject
Europe
United States
18
Russia
14
Switzerland
9
Soviet Union
8
Netherlands
6
Russia (Federation)
6
France
5
Germany
5
European Union countries
4
4
3
Europa
3
Europe, Eastern
3
European Economic Community countries
3
Great Britain
3
India
3
Japan
3
Middle East
3
Sweden
3
Aleppo (Syria)
2
Amsterdam
2
Arab countries
2
Asia
2
China
2
East Prussia (Poland and Russia)
2
Moyen-Orient
2
Prussia, East (Poland and Russia)
2
Suisse
2
Turkey
2
2
1
4.210.150
1
Africa
1
Africa, Central
1
Africa, North
1
Afrique
1
Afrique du Nord
1
Alep (Syrie)
1
Aleppo
1
Arabian Peninsula
1
Asie
1
Australia
1
Austria
1
Banat
1
Belgium
1
Belgrade (Serbia)
1
Bucharest (Romania)
1
Croatia
1
Cyprus
1
Danube River Valley
1
Developing countries
1
more ...