Region
- United States 194 results
- California 17 results
- Great Britain 9 results
- Pennsylvania 7 results
- Germany 6 results
- Massachusetts 5 results
- Pittsburgh 5 results
- Africa, Sub-Saharan 4 results
- New York (State) 4 results
- Russia 4 results
- Soviet Union 4 results
- Sub-Saharan Africa 4 results
- Australia 3 results
- Boston 3 results
- Boston (Mass.) 3 results
- Brazil 3 results
- Canada 3 results
- China 3 results
- European Union countries 3 results
- Italy 3 results
- Pittsburgh (Pa.) 3 results
- Puerto Rico 3 results
- Spain 3 results
- West (U.S.) 3 results
- Africa 2 results
- Developing countries 2 results
- Europe 2 results
- Indonesia 2 results
- Japan 2 results
- New York 2 results
- New York (N.Y.) 2 results
- New Zealand 2 results
- North Andover 2 results
- Pakistan 2 results
- Panama Canal 2 results
- Southwestern States 2 results
- Austria 1 results
- Black Sea Region 1 results
- Caspian Sea Region 1 results
- Chicago 1 results
- Chicago (Ill.) 1 results
- Cleveland 1 results
- Cologne 1 results
- Colorado 1 results
- Columbus, Ohio 1 results
- Denver 1 results
- England 1 results
- Europe, Eastern 1 results
- États-Unis 1 results
- France 1 results more…