Region
Soviet Union --
132
Soviet Union
85
United States --
31
United States
29
Russia (Federation) --
13
Asia
7
Asia --
7
China --
7
Europe, Eastern --
7
Russia (Federation)
7
China
6
Europe, Eastern
6
Europe
5
Europe --
5
Asia, Southeastern
3
Asia, Southeastern --
3
Developing countries --
3
Pacific Area
3
Pacific Area --
3
Russia --
3
Yugoslavia --
3
Developing countries
2
India
2
India --
2
Middle East
2
Middle East --
2
Yugoslavia
2
Afghanistan --
1
Arctic Ocean
1
Asia, Central
1
Asia, Central --
1
Barents Sea
1
Barents Sea --
1
East Asia
1
East Asia --
1
Egypt
1
Egypt --
1
Former Soviet republics --
1
Germany
1
Hungary
1
Hungary --
1
Israel
1
Israel --
1
Japan --
1
Latin America
1
Latin America --
1
Malaysia
1
Malaysia --
1
Miscellanea
1
Norway
1
more ...