Geography
United States
271 results
China
21 results
Japan
18 results
Great Britain
15 results
India
15 results
Soviet Union
15 results
Germany
9 results
Developing countries
8 results
Israel
8 results
Latin America
8 results
Africa
6 results
Canada
6 results
Mexico
6 results
Australia
5 results
États-Unis
5 results
Argentina
4 results
Austria
4 results
Egypt
4 results
European Union countries
4 results
France
4 results
Russia
4 results
Asia
3 results
Brazil
3 results
Europe
3 results
Europe, Eastern
3 results
South America
3 results
Turkey
3 results
USA
3 results
Vietnam
3 results
Yemen (Republic)
3 results
Communist countries
2 results
Czech Republic
2 results
East Asia
2 results
England
2 results
Italy
2 results
Korea
2 results
Korea (South)
2 results
Minnesota
2 results
Pakistan
2 results
Peru
2 results
Philippines
2 results
Poland
2 results
Slovakia
2 results
Spain
2 results
Sweden
2 results
Taiwan
2 results
Tamil Nadu
2 results
Tanzania
2 results
Africa, Sub-Saharan
1 results
Alaska
1 results
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