Subject Region
United States
216
France
36
Great Britain
34
Europe
25
Latin America
17
Germany
16
Israel
11
Spain
10
India
8
Canada
7
Soviet Union
7
Iran
5
Mexico
5
California
4
Espana
4
Europe, Western
4
Western countries
4
America Latina
3
Chile
3
Europe, Eastern
3
European Union countries
3
Germany (West)
3
Québec (Province)
3
Saxony
3
Saxony (Germany)
3
Texas
3
Africa
2
Andhra Pradesh
2
Argentina
2
Austria
2
Balkan Peninsula
2
Bolivia
2
Brazil
2
Bulgaria
2
Central America
2
Developing countries
2
England
2
Europa
2
Houston
2
Houston (Tex.)
2
Hungary
2
Italy
2
Los Angeles
2
New York (State)
2
Peru
2
Poland
2
Portugal
2
South Africa
2
South America
2
America del Sur
1
more ...