Subject Region
United States
280
Great Britain
34
France
26
Canada
23
Spain
21
California
19
Illinois
19
Chicago
18
New York (State)
17
England
15
Europe
15
Germany
15
Argentina
14
Mexico
12
New York
12
Southern States
12
China
11
Korea (South)
10
Ontario
9
Pennsylvania
9
Espana
8
Wisconsin
8
Chicago (Ill.)
7
Developing countries
7
Israel
7
Italy
7
Japan
7
South Africa
7
Soviet Union
7
Australia
6
Cuba
6
India
6
Latin America
6
Los Angeles
6
New York (N.Y.)
6
Russia
6
Africa
5
Brazil
5
Ireland
5
Massachusetts
5
Russia (Federation)
5
Toronto
5
America
4
Arizona
4
Bolivia
4
Boston
4
Chile
4
Detroit
4
Europe, Western
4
Huelva (Province)
4
more ...