Region
United States
20
China
10
Soviet Union
10
Europe
5
Middle East
5
Asia
4
France
4
Japan
4
India
3
Africa
2
Europe, Eastern
2
Greece
2
Israel
2
Afghanistan
1
Africa, Central
1
Africa, East
1
Asia, Central
1
Asia, Eastern
1
Atlantic Coast
1
Bali Island
1
Canada
1
Communist countries
1
Developing countries
1
East Asia
1
Egypt
1
England
1
Florida
1
Germany
1
Germany (East)
1
Germany (West)
1
Great Britain
1
Hungary
1
Indian Ocean Region
1
Indonesia
1
Iran
1
Iraq
1
Ireland
1
Java
1
Korea
1
Korea (North)
1
Korea (South)
1
London (England)
1
Macedonia
1
Netherlands
1
Normandy
1
Pacific Ocean
1
Persian Gulf Region
1
Rio Grande Watershed (Colo.-Mexico and Tex.)
1
Russia
1
Spain
1
more ...