Region
United States --
United states --
United States
28
Japan
4
Japan --
4
Soviet Union --
3
Asia
2
Cambodia --
2
China --
2
Developing countries
2
Germany
2
Germany --
2
India
2
India --
2
Pacific area
2
Soviet Union
2
Vietnam
2
Vietnam --
2
Africa, Northeast
1
Africa, Northeast --
1
Africa, Southern --
1
Asia --
1
Cambodia
1
Caribbean Area --
1
China
1
Greece
1
Greece --
1
Indonesia
1
Indonesia --
1
Korea (South)
1
Korea(Souith) --
1
Korea(South)
1
Korea(South) --
1
Latin America
1
Latin America --
1
Middle East
1
Middle East --
1
Pacific --
1
Pacific area --
1
Pakistan
1
Pakistan --
1
Panama
1
Panama --
1
Unites States
1