Geographic Subject
Sweden
147
Germany
102
France
42
Netherlands
37
Switzerland
35
Finland
18
Denmark
15
Germany (West)
15
Indonesia
14
Ethiopia
12
Tanzania
11
Tropics
11
Africa
9
Italy
9
Europe
8
Kenya
8
Côte d'Ivoire
7
Developing countries
7
Estonia
7
Cameroon
6
Romania
6
Suède
6
Vietnam
6
Austria
5
Brazil
5
Burkina Faso
5
Prussia
5
Serbia
5
Africa, West
4
China
4
Egypt
4
Great Britain
4
India
4
Java
4
Sahel
4
Sumatra
4
Algeria
3
Benin
3
Greece
3
Greenland
3
Hesse
3
Madagascar
3
Palestine
3
Saxony
3
Serbia and Montenegro
3
South Africa
3
Sri Lanka
3
Thailand
3
Uganda
3
4.050
2
more ...