Subject Region
United States
284
Great Britain
57
England
38
Europe
18
Mexico
13
Developing countries
12
London
11
Canada
10
New York (State)
9
Pennsylvania
8
China
7
Germany
7
France
6
Japan
6
New York
6
California
5
Soviet Union
5
European Union countries
4
Massachusetts
4
New Jersey
4
Russia (Federation)
4
Africa
3
Espana
3
India
3
Italy
3
New England
3
North America
3
Ohio
3
Oregon
3
Peru
3
Scotland
3
Singapore
3
South Africa
3
Spain
3
Sweden
3
Allentown Metropolitan Area
2
Bethlehem Metropolitan Area
2
Boston
2
Caribbean Area
2
Colorado
2
Developed countries
2
Easton Metropolitan Area (Northampton County)
2
Essex (England)
2
Florida
2
Illinois
2
Indiana
2
Ireland
2
Israel
2
Kentucky
2
Latin America
2
more ...