Region
- Developing countries
- United States 34 results
- Soviet Union 12 results
- European Union countries 11 results
- New Zealand 11 results
- Great Britain 10 results
- Asia 9 results
- Europe 9 results
- Africa 7 results
- Europe, Eastern 6 results
- Japan 6 results
- China 5 results
- India 5 results
- Latin America 5 results
- Africa, Sub-Saharan 4 results
- Commonwealth countries 4 results
- Developed countries 4 results
- European Economic Community countries 3 results
- Tropics 3 results
- Australia 2 results
- Foreign countries 2 results
- Iran 2 results
- Islamic countries 2 results
- Kenya 2 results
- Oceania 2 results
- Pacific Area 2 results
- Singapore 2 results
- Arab countries 1 results
- Bombay 1 results
- Brazil 1 results
- California 1 results
- Canada 1 results
- Case studies 1 results
- Colonies 1 results
- Communist countries 1 results
- East Asia 1 results
- East Indies 1 results
- England 1 results
- Environmental aspects 1 results
- Estonia 1 results
- Ethiopia 1 results
- European Union coutries 1 results
- France 1 results
- Germany 1 results
- Ghana 1 results
- Indonesia 1 results
- Korea (South) 1 results
- Malaysia 1 results
- Mozambique 1 results
- Netherlands 1 results more…