Region
- United States 44 results
- Developing countries 14 results
- Africa, Sub-Saharan 6 results
- Great Britain 6 results
- Europe 4 results
- Southern States 4 results
- Alabama 2 results
- America 2 results
- California 2 results
- Charleston Region (S.C.) 2 results
- Confederate States of America 2 results
- Cyprus 2 results
- Ecuador 2 results
- France 2 results
- Greece 2 results
- Hanford Site (Wash.) 2 results
- Kenya 2 results
- Los Angeles 2 results
- Los Angeles (Calif.) 2 results
- Macon County 2 results
- Missouri River Valley 2 results
- New Jersey 2 results
- New Zealand 2 results
- Newark 2 results
- North Carolina 2 results
- Oregon 2 results
- South Carolina 2 results
- Southwest, New 2 results
- Tanzania 2 results
- Washington (State) 2 results
- Western Mediterranean 2 results