Region
- United States 38 results
- England 24 results
- Great Britain 22 results
- France 14 results
- New Zealand 14 results
- Soviet Union 13 results
- Australia 11 results
- Germany 11 results
- Italy 11 results
- Austria 6 results
- Antarctica 5 results
- Japan 5 results
- Netherlands 5 results
- Poland 5 results
- Denmark 4 results
- Sweden 4 results
- Brazil 3 results
- Ireland 3 results
- Scotland 3 results
- Taiwan 3 results
- Canada 2 results
- China 2 results
- Christchurch 2 results
- Falkland Islands 2 results
- Switzerland 2 results
- Amazon River Region 1 results
- Arctic regions 1 results
- Belgium 1 results
- Berlin 1 results
- Borneo 1 results
- Boulder City 1 results
- Boulder City (Nev.) 1 results
- Brisbane 1 results
- California 1 results
- Canterbury 1 results
- Colorado River (Colo.-Mexico) 1 results
- Developing countries 1 results
- Egypt 1 results
- Europe 1 results
- Germany (West) 1 results
- Gombe Stream National Park 1 results
- Greece 1 results
- Hokkaido 1 results
- Holland 1 results
- Hoover Dam (Ariz. and Nev.) 1 results
- India 1 results
- Maine 1 results
- Nevada 1 results
- New South Wales 1 results
- New York 1 results more…