Subject Region
United States
89
Great Britain
43
English-speaking countries
16
England
10
France
4
Austria
2
Hungary
2
Africa
1
Canada
1
Developing countries
1
Europe
1
Greece
1
Ireland
1
Israel
1
Italy
1
Latin America
1
Mexico
1
Middle West
1
New York
1
New York (State)
1
North America
1
Prairie Provinces
1
Wales
1