Region
Europe
6
United States
6
America
2
Developing countries
2
Aegean Sea Region
1
Allemagne
1
Amérique
1
Asia
1
Athens (Greece)
1
Canada
1
Easter Island
1
États-Unis
1
France
1
Germany
1
Grande-Bretagne
1
Great Basin
1
Great Britain
1
Greece
1
India
1
Iran
1
Mexico
1
Northeastern States
1
Outer space
1
Philadelphia (Pa.)
1
Philadelphia Pa
1
Spain
1
Virginia
1