Region
- United States 83 results
- Great Britain 9 results
- Developing countries 6 results
- Africa 5 results
- America 5 results
- Europe 5 results
- France 4 results
- Australia 3 results
- Canada 3 results
- China 3 results
- Greece 3 results
- Mexico 3 results
- Foreign countries 2 results
- Germany 2 results
- Netherlands 2 results
- New York (State) 2 results
- Oregon 2 results
- Rome 2 results
- Adriatic Sea Region 1 results
- Afrique du Sud 1 results
- Alexandria 1 results
- Appalachian Region, Southern 1 results
- Argentina 1 results
- Argentine 1 results
- Babylonia 1 results
- Bamberg 1 results
- Bamberg (Germany) 1 results
- Brazil 1 results
- Buenos Aires 1 results
- Castile 1 results
- Castile (Spain) 1 results
- Crete 1 results
- Crete (Greece) 1 results
- Delaware River Watershed (N.Y.-Del. and N.J.) 1 results
- Egypt 1 results
- El Salvador 1 results
- England 1 results
- Eurasia 1 results
- Europe, Central 1 results
- European Union countries 1 results
- Fieldwork 1 results
- Germany (West) 1 results
- Hanford Site (Wash.) 1 results
- Hawaii 1 results
- Illinois 1 results
- Iraq 1 results
- Islamic countries 1 results
- Islands of the Pacific 1 results
- Israel 1 results
- Ithaca 1 results more…