Geographic Subject
United States
43
India
32
Canada
16
France
16
Germany
16
Indonesia
11
China
9
Nigeria
9
North Carolina
9
Pakistan
8
Sweden
8
Prussia (Germany)
7
Argentina
6
Great Britain
6
South Africa
5
Soviet Union
5
Virginia
5
Guyana
4
Netherlands
4
Pennsylvania
4
Rome
4
Switzerland
4
Australia
3
Florida
3
Mexico
3
Nepal
3
Turkey
3
Wisconsin
3
4.415
2
Anguilla
2
Austria
2
Bavaria (Germany)
2
Brazil
2
Buenos Aires (Argentina : Province)
2
Buenos Aires (Province)
2
Bulgaria
2
Colorado
2
Congo (Democratic Republic)
2
Denmark
2
Developing countries
2
Egypt
2
Georgia
2
Germany (West)
2
Hawaii
2
Hungary
2
Iceland
2
Ireland
2
Italy
2
Korea (South)
2
Malaya
2
more ...