Geographic Subject
India
335
United States
209
France
162
Germany
153
Indonesia
123
Great Britain
74
Switzerland
70
Soviet Union
63
North Carolina
59
Russia (Federation)
39
China
34
Germany (West)
30
Netherlands
30
Japan
29
Pakistan
29
Brazil
27
Russia
26
Virginia
26
Sweden
24
Singapore
23
Poland
22
Yugoslavia
22
Developing countries
20
Malaysia
19
Argentina
18
Egypt
18
Massachusetts
18
Bangladesh
16
Italy
16
Prussia
15
Mexico
14
Sri Lanka
14
Gujarat
13
Thailand
13
Europe
12
Canada
10
Guatemala
10
Illinois
10
Tamil Nadu
10
Austria
9
Dominican Republic
9
Nepal
9
Romania
9
Turkey
9
Amsterdam
8
Belgium
8
Bulgaria
8
Haiti
8
Africa
7
Andhra Pradesh
7
more ...