Region
Africa, Southern --
1
Caribbean Area --
1
Developing countries
2
Developing countries --
1
Europe --
3
Foreign countries
2
France
1
France --
1
Germany
3
Germany --
3
Great Britain
2
Great Britain --
2
Japan
2
Japan --
4
South Asia --
1
Soviet Union
1
Soviet Union --
2
Spain --
1
United States
6
United States - --
1
United States --
10
United states --
4
Yugoslavia
1
Yugoslavia --
1