Region
- United States 242 results
- Great Britain 13 results
- Japan 6 results
- Australia 4 results
- Middle West 4 results
- Africa, Sub-Saharan 3 results
- Colorado 3 results
- Europe 3 results
- Maryland 3 results
- Alberta 2 results
- Albuquerque 2 results
- Baltimore 2 results
- Brooks Air Force Base (Tex.) 2 results
- China 2 results
- Melbourne (Vic.) 2 results
- New Mexico 2 results
- OECD countries 2 results
- Soviet Union 2 results
- Sub-Saharan Africa 2 results
- Alabama 1 results
- Belgium 1 results
- Bethesda 1 results
- Boston 1 results
- Calgary 1 results
- Denmark 1 results
- Denver 1 results
- ESTADOS UNIDOS 1 results
- Florida 1 results
- Förenta staterna 1 results
- Germany 1 results
- India 1 results
- Indonesia 1 results
- Italy 1 results
- Kuwait 1 results
- Massachusetts 1 results
- Melbourne 1 results
- Miami-Dade County 1 results
- Minnesota 1 results
- New Jersey 1 results
- Pacific Area 1 results
- Princeton 1 results
- Seattle 1 results
- Shanghai 1 results
- Sweden 1 results
- Taiwan 1 results
- Utah 1 results
- Victoria 1 results
- Washington (State) 1 results