Subject Region
United States
117
European Union countries
21
Developing countries
18
Mexico
18
Europe
17
Great Britain
15
China
14
Japan
12
Spain
12
Canada
10
Espana
9
Colombia
7
Germany
5
Italy
5
Latin America
5
Russia (Federation)
4
Argentina
3
Brazil
3
Chile
3
India
3
Indonesia
3
Ireland
3
Mauritius
3
Portugal
3
Africa
2
Africa, West
2
Asia
2
Caribbean Area
2
Central America
2
East Asia
2
Ecuador
2
Estados Unidos
2
France
2
Germany (West)
2
Romania
2
Russia
2
Southeast Asia
2
Soviet Union
2
Sweden
2
Ukraine
2
Uruguay
2
Africa, North
1
Africa, Sub-Saharan
1
America Latina
1
Australia
1
Barbados
1
Bern <1999>
1
Bogotá
1
Boston
1
Boston (Mass.)
1
more ...