Region
Developing countries
United States
47
Soviet Union
25
Africa
3
Asia
3
Commonwealth countries
3
Eastern Europe
3
Europe, Eastern
3
India
3
Japan
3
Argentina
2
China
2
Europe
2
Foreign countries
2
Ghana
2
Korea (South)
2
West Indies
2
Afghanistan
1
Africa, Southern
1
Australia
1
Bangladesh
1
California
1
Chicago Metropolitan Area
1
Chile
1
English-speaking countries
1
Germany
1
Germany (East)
1
Germany (West)
1
Illinois
1
Malaysia
1
Netherlands
1
New Zealand
1
Norway
1
Pakistan
1
Russia (Federation)
1
Santa Clara Valley (Santa Clara County)
1
Southern Africa
1
Tanzania
1
Vietnam
1
Western countries
1
Yugoslavia
1