Region
- United States 16 Treffer
- Europe 9 Treffer
- European Economic Community countries 3 Treffer
- Great Britain 3 Treffer
- India 2 Treffer
- Middle East 2 Treffer
- Portugal 2 Treffer
- Asia 1 Treffer
- Baltic States 1 Treffer
- Berlin (Germany) 1 Treffer
- Developing countries 1 Treffer
- France 1 Treffer
- Germany (West) 1 Treffer
- Indonesia 1 Treffer
- Iowa 1 Treffer
- Islamic countries 1 Treffer
- Israel 1 Treffer
- New Zealand 1 Treffer
- South Africa 1 Treffer
- South Asia 1 Treffer
- Soviet Union 1 Treffer
- Turkey 1 Treffer