Subject Region
United States
63
England
8
Great Britain
6
India
4
Athens
3
Espana
3
Greece
3
Massachusetts
3
Rome
3
Spain
3
Boston
2
Israel
2
Ohio
2
Oregon
2
Australia
1
Belgium
1
Boston (Mass.)
1
California, Northern
1
Canada
1
Colombia
1
Czech Republic
1
Developing countries
1
Europa
1
Europe
1
Kentucky
1
New England
1
New Hampshire
1
New York (State)
1
Pakistan
1
Pennsylvania
1
Vanuatu
1