Region
United States
4
Germany
3
Great Britain
3
Argentina
2
Asia
2
Australia
2
Austria
2
Belgium
2
Brazil
2
Brésil
2
Canada
2
Colombia
2
Denmark
2
Developing countries
2
Europe
2
Finland
2
France
2
India
2
Ireland
2
Italy
2
Japan
2
Kenya
2
Latin America
2
Mongolia
2
Netherlands
2
New Zealand
2
Nigeria
2
Norway
2
Periodicals
2
Spain
2
Sweden
2
Switzerland
2
1945-
1
Afghanistan
1
Africa
1
Africa, North
1
Afrique du Sud
1
Albania
1
Allemagne
1
Angola
1
Arabie Saoudite
1
Argentine
1
Asia, Central
1
Autriche
1
Bangladesh
1
Belarus
1
Bolivia
1
Bolivie
1
Bosnia and Herzegovina
1
Bulgaria
1
more ...