Geographic Subject
United States
17
Germany
16
Germany (West)
10
France
9
Pakistan
9
India
7
Switzerland
5
Singapore
4
Great Britain
3
4.415
2
China
2
Germany, East
2
Germany, West
2
Indonesia
2
Morocco
2
Netherlands
2
Ohio
2
Russia (Federation)
2
7.150
1
Arizona
1
Asia, Southeastern
1
Bangladesh
1
Berlin
1
Cameroon
1
Canada
1
Developing countries
1
England
1
Frankfurt am Main
1
Hong Kong
1
Hong Kong (China)
1
Italy
1
Japan
1
Malaysia
1
Milwaukee
1
Munich
1
Réunion
1
Strasbourg
1
Strassburg
1
Wisconsin
1
Zurich
1
Zurich (Switzerland)
1