Region
- Communist countries 6 results
- Developing countries 4 results
- New Zealand 4 results
- Soviet Union 4 results
- Europe, Eastern 3 results
- United States 3 results
- Africa 1 results
- Africa, West 1 results
- Australia 1 results
- Canada 1 results
- China 1 results
- Cuba 1 results
- France 1 results
- Germany 1 results
- Great Britain 1 results
- Greece 1 results
- Paris 1 results