Bölge
Europe
United States
7
Japan
6
France
3
Europe, Western
2
Germany (West)
2
Industries
2
Asia
1
Atlantic Coast
1
Atlantic Coast (Europe)
1
Donets Basin
1
Donets Basin (Ukraine and Russia)
1
East Asia
1
Eastern Europe
1
Europa
1
Europe de l'Ouest
1
Europe, Eastern
1
European Economic Community countries
1
États-Unis
1
OECD countries
1
Pays de l'Union européenne
1
Pays de l'Union européenne
1
Soviet Union
1
URSS
1
USA
1
Ukraine
1
Western Europe
1
Westeuropa
1