Region
- United States 7 results
- Europe 5 results
- Great Britain 5 results
- Netherlands 3 results
- Antarctica 2 results
- Tropics 2 results
- Africa 1 results
- Antarctic Ocean 1 results
- Arctic regions 1 results
- Atlantic Coast (Africa) 1 results
- Atlantic Coast (North America) 1 results
- Canada 1 results
- Developing countries 1 results
- England 1 results
- European Economic Community countries 1 results
- European Union countries 1 results
- Germany (West) 1 results
- Latin America 1 results
- Leiden 1 results
- New Zealand 1 results
- Pacific Coast (Or.) 1 results
- Pacific Coast (Wash.) 1 results
- Pacific area 1 results
- Polar regions 1 results
- Soviet Union 1 results
- Sweden 1 results
- Thorney Island 1 results