Region
Soviet Union --
Soviet Union
142
United States --
66
United States
54
Europe, Eastern --
18
Europe, Eastern
16
Asia
9
Developing countries
9
Russia (Federation) --
9
Asia --
8
China
7
China --
7
Europe --
7
Middle East
7
Middle East --
7
Russia
6
Europe
5
India
5
India --
5
Russia --
5
East Asia --
4
Japan --
4
Pacific Area
4
Pacific Area --
4
Russia (Federation)
4
Developing countries --
3
East Asia
3
Israel
3
Israel --
3
Japan
3
Malaysia
3
Syria
3
Syria --
3
United states --
3
Yugoslavia --
3
Asia, Central --
2
Asia, Southeastern
2
Asia, Southeastern --
2
Eastern Europe
2
Former Soviet republics --
2
Great Britain
2
Great Britain --
2
Pakistan
2
Pakistan --
2
Yugoslavia
2
Afghanistan --
1
Africa, Northeast
1
Africa, Northeast --
1
Africa, Southern --
1
Asia - --
1
more ...