Geographic Subject
Germany
313
Soviet Union
260
Russia (Federation)
157
Sweden
85
Göttingen
67
Switzerland
60
India
50
Netherlands
39
France
34
Marburg
32
Leipzig
30
Paris
27
Berlin
26
Indonesia
23
Siberia
21
Uppsala
19
Jena
18
United States
18
Earth
17
Giessen
17
Tübingen
15
Zurich
15
Breslau
13
Germany (West)
13
Halle
13
Russian Far East
13
Finland
11
Heidelberg
11
Zürich
11
Bern
10
Bonn
10
Developing countries
9
Lund
9
Munich
9
Denmark
7
Dissertations
7
Russia
7
China
6
Groningen
6
Leiden
6
Münster
6
Siberia, Western
6
Asia, Southeastern
5
Australia
5
Bangladesh
5
Malaysia
5
Pakistan
5
Poland
5
Russian Far East (Russia)
5
Sakha
5
more ...