Geography
OECD countries
10 results
China
4 results
Canada
2 results
Chine
2 results
Japan
2 results
Soviet Union
2 results
Sweden
2 results
Australia
1 results
Austria
1 results
Bulgaria
1 results
Europe, Eastern
1 results
Europe, Southern
1 results
European Economic Community countries
1 results
Finland
1 results
Greece
1 results
Iceland
1 results
Korea (South)
1 results
New Zealand
1 results
Norway
1 results
Romania
1 results
Roumanie
1 results
Slovenia
1 results
Switzerland
1 results
Turkey
1 results
URSS
1 results
United States
1 results
Yugoslavia
1 results