Region
prev ...
Pennsylvania
4
Philippines
4
Slovenia
4
South Carolina
4
Turkey
4
Allemagne
3
Asia
3
California
3
Egypt
3
Europe centrale
3
European Union countries
3
Georgia
3
Hungary
3
Ireland
3
Japan
3
Mississippi
3
Missouri
3
Ohio
3
Pacific Area
3
Research Triangle Park Region
3
Research Triangle Park Region (N.C.)
3
Romania
3
Russie
3
Saudi Arabia
3
Southeast Asia
3
Soviet Union
3
Tennessee
3
Venezuela
3
Afrika
2
Afrique
2
Andes Region
2
Arab countries
2
Asie
2
Asie du Sud-Est
2
Australie
2
Austria
2
Belgium
2
Bolivia
2
Bosnia and Herzegovina
2
Caribbean Area
2
Central America
2
Colombie
2
Communist countries
2
Czech Republic
2
Denmark
2
Detroit
2
Detroit (Mich.)
2
Finlande
2
Florida
2
GRAN BRETANA
2
more ...