Region
20th century
1
21st century
1
Aalborg
1
Aberdeen
1
Africa
69
Africa, East
2
Africa, French-speaking Equatorial
1
Africa, French-speaking West
1
Africa, North
2
Africa, Southern
2
Africa, Sub-Saharan
7
Africa, West
3
Afrique
1
Aims and objectives
1
Alabama
2
Algeria
1
Allemagne
1
Amazon River Region
3
Ambato Valley
1
Ambato Valley (Argentina)
1
America
16
Amerika
1
Amsterdam
2
Amérique du Nord
1
Andes Region
2
Antioch
1
Appalachian Region, Southern
1
Arab countries
6
Arctic regions
1
Argentina
13
Arizona
1
Arles (France)
1
Art
3
Ashokan Reservoir
2
Ashokan Reservoir (N.Y.)
2
Asia
15
Athens
5
Athens (Greece)
4
Atlantic Ocean Region
1
Australia
19
Australien
1
Austria
19
Babylonia
1
Baltimore
1
Bamako
1
Basel
1
Basel (Switzerland)
1
Belgium
3
Belize
1
Benelux countires
1
more ...