Subject Region
United States
27
Great Britain
14
England
7
Austria
3
France
3
Soviet Union
3
Vienna
3
Africa
2
America
2
Brazil
2
Europe
2
North America
2
Portugal
2
Russia
2
Vienna (Austria)
2
Developing countries
1
English-speaking countries
1
Germany
1
Isla Mujeres (Mexico)
1
Morocco
1
Quebec (Province)
1
Québec (Province)
1
Russia (Federation)
1
Spain
1