Region
Soviet Union
Soviet Union --
43
United States
18
United States --
18
Asia
6
Asia --
5
Europe --
4
China
3
China --
3
East Asia
3
East Asia --
3
Europe
3
Europe, Eastern
3
Europe, Eastern --
3
Japan --
2
Pacific Area
2
Afghanistan --
1
Africa, Northeast
1
Africa, Northeast --
1
Asia, Southeastern
1
Asia, Southeastern --
1
Baltic States
1
Czechoslovakia
1
Czechoslovakia --
1
Developing countries
1
Eastern Europe
1
Ethiopia
1
Ethiopia --
1
Germany
1
Germany --
1
Great Britain
1
Great Britain --
1
India
1
India --
1
Islamic countries
1
Islamic countries --
1
Japan
1
Korea
1
Korea --
1
Kuvil Islands (Russia)
1
Pacific Area --
1
Pacific Ocean Region
1
Pacific Ocean Region --
1
Pakistan
1
Pakistan --
1
Poland
1
Poland --
1
Romania
1
Romania --
1
Russia
1
more ...