Region
Africa, Southern --
1
Caribbean Area --
1
Developing countries
1
Europe --
1
France
1
France --
1
Germany
3
Germany (East)
1
Germany (East) --
1
Germany (West)
1
Germany (West) --
1
Germany --
3
Great Britain
2
Great Britain --
2
Japan
1
Japan --
3
Russia
1
Russia (Federation)
1
Russia (Federation) --
1
Russia --
1
Soviet Union
2
Soviet Union --
3
Spain --
1
United States
6
United States --
11
United states --
4
Yugoslavia
1
Yugoslavia --
1