Geographic Subject
United States
48
Costa Rica
26
Colombia
18
India
17
Chile
15
Bolivia
13
China
8
Nepal
8
Ecuador
7
El Salvador
7
Soviet Union
7
Argentina
6
Asia
6
Japan
6
Latin America
6
Pakistan
6
États-Unis
6
Indonesia
5
Mongolia
5
Arab countries
4
Middle East
4
Venezuela
4
Afghanistan
3
Bangladesh
3
Brazil
3
Cuba
3
Developing countries
3
Dominican Republic
3
Guatemala
3
Haiti
3
Mexico
3
Peru
3
Thailand
3
Asia, Central
2
Asia, Southeastern
2
Balkan Peninsula
2
Colombie
2
East Asia
2
France
2
Germany
2
Oceania
2
South Asia
2
Sri Lanka
2
Tanzania
2
Turkey
2
Uruguay
2
7.150
1
Bolivie
1
Congo (Democratic Republic)
1
Great Britain
1
more ...