Subject Region
United States
371
Great Britain
314
Europe
110
Africa
73
France
65
Rome
62
Germany
52
China
47
America
45
Asia
44
India
41
Japan
39
Developing countries
34
Philippines
33
Russia
32
Latin America
31
Commonwealth countries
28
Middle East
28
Spain
27
Soviet Union
25
Russia (Federation)
17
Turkey
17
Canada
15
England
15
North America
15
Greece
13
Iran
13
Pacific Area
13
Hawaii
12
Caribbean Area
11
South Africa
11
Australia
9
Foreign countries
9
Netherlands
9
East Asia
8
Mediterranean Region
8
Portugal
8
Cuba
7
Europe, Eastern
7
Italy
7
Korea
7
Southeast Asia
7
Afghanistan
6
Brazil
6
California
6
Eurasia
6
Madagascar
6
Tibet Autonomous Region (China)
6
Africa, North
5
Austria
5
more ...