Subject Region
United States
191
Great Britain
119
England
107
Massachusetts
31
Developing countries
19
Scotland
18
London
16
Pennsylvania
16
Mexico
12
Europe
10
Ireland
10
London (England)
10
Philadelphia
10
New York (State)
9
Boston
8
Germany
8
Japan
8
Latin America
8
New York
8
China
7
Canada
6
Spain
6
Edinburgh
5
France
5
New Hampshire
5
Connecticut
4
Middle East
4
Netherlands
4
North America
4
Africa, North
3
Amsterdam
3
Boston (Mass.)
3
Chile
3
Dublin
3
Europe, Eastern
3
European Union countries
3
South Africa
3
Soviet Union
3
Asia
2
Australia
2
Bolivia
2
California
2
Caribbean Area
2
East Asia
2
Europe, Central
2
Gabon
2
Hamburg
2
India
2
Louisiana
2
Maine
2
more ...