Region
United States --
10
United States
7
Asia
5
Asia --
5
Soviet Union
5
Soviet Union --
5
Europe --
4
Southeast Asia
4
Europe
3
Europe, Eastern --
3
Pacific Area
3
Pacific Area --
3
Southeast Asia --
3
Asia, Southeastern --
2
Europe, Eastern
2
Great Britain
2
Great Britain --
2
Russia
2
Russia --
2
Africa, Southern --
1
Arctic regions --
1
Argentina
1
Argentina --
1
Asia, Southeastern
1
Asia, southeastern --
1
Australia
1
Australia --
1
Canada --
1
Central America
1
Central America --
1
China
1
China --
1
Cuba
1
Cuba --
1
Developing countries
1
Developing countries --
1
East Asia
1
East Asia --
1
Falkland Islands --
1
Finland
1
Finland --
1
Former Soviet republics --
1
Germany
1
Germany --
1
Indochina
1
Indochina --
1
Indonesia
1
Indonesia --
1
Japan --
1
Korea (South)
1
more ...