Region
Africa
1
Andes Region
1
Argentina
1
Asia
2
Asie
1
Australia
2
Brazil
2
Canada
3
Chile
2
China
7
Cuba
1
Developing countries
1
East Asia
1
Europe
1
France
1
Germany
4
Great Britain
1
Harare (Zimbabwe)
3
Highfield (Zimbabwe)
3
India
1
Japan
5
Latin America
8
Liberia
1
Malaysia
4
Middle West
2
Mongolia
1
New Orleans (La.)
3
New York (N.Y.)
3
New Zealand
2
North Carolina
1
Northeastern States
2
Pennsylvania
1
Peru
1
Philadelphia
1
Philadelphia (Pa.)
1
Poland
3
Russia (Federation)
7
San Francisco (Calif.)
3
Singapore
2
South Africa
2
Soviet Union
2
Taiwan
2
Tennessee, Middle
1
Turkey
1
United States
60
Venezuela
1
Washington (D.C.)
1
Western countries
2
Zimbabwe
3
États-Unis
1