Region
- United States 294 results
- Great Britain 31 results
- Colorado 17 results
- European Union countries 9 results
- California 6 results
- Arab countries 4 results
- China 4 results
- New York (State) 4 results
- Europe 3 results
- États-Unis 3 results
- Black Hills National Forest (S.D. and Wyo.) 2 results
- Brazil 2 results
- Developing countries 2 results
- EU-landen 2 results
- England 2 results
- European Economic Community countries 2 results
- Ithaca 2 results
- Massachusetts 2 results
- Netherlands 2 results
- Wales 2 results
- Arizona 1 results
- Australia 1 results
- Bristol (England) 1 results
- Canada 1 results
- Chesapeake Bay Region (Md. and Va.) 1 results
- Entwicklungsländer 1 results
- Etats-Unis d'Amérique 1 results
- États-Unis 1 results
- France 1 results
- Förenta staterna 1 results
- Hong Kong 1 results
- Jefferson County, Tennessee 1 results
- Mexico 1 results
- Middle West 1 results
- Minnesota 1 results
- Moon 1 results
- Oregon 1 results
- Pacific Area 1 results
- Rio de Janeiro 1 results
- South Carolina 1 results
- United States of America 1 results
- Verenigde Staten 1 results
- West (U.S.) 1 results
- Wisconsin 1 results