Subject Region
1980-1989
1
1990-1999
3
20e Arrondissement (Paris, France)
1
798 (Beijing, China : District)
1
Aberystwyth (Wales)
1
Abidjan
2
Abidjan (Côte d'Ivoire)
2
Abkhazia (Georgia)
1
Accra
1
Adams County
1
Adams County (Wash.)
1
Afghanistan
18
Africa
50
Africa, Central
1
Africa, North
4
Africa, Southern
1
Africa, Sub-Saharan
5
Africa, West
13
Ahmadābād
1
Ahmadābād (India)
1
Alabama
9
Alamo (San Antonio, Tex.)
1
Alaska
13
Alaska, Gulf of (Alaska)
1
Albania
1
Albuquerque
6
Aleppo
1
Aleppo (Syria)
1
Aleutian Islands
1
Alexandra (Johannesburg)
1
Alexandria
2
Alexandria (Egypt)
1
Algeria
13
Algiers
1
Aligarh
1
Alps, French (France)
1
Altar Valley
1
Amazon River Region
4
Amazonas (Department)
1
Amchitka Island
1
America
7
Amsterdam
2
Angola
3
Anniston (Ala.)
1
Antarctica
4
Apache Tribe of Oklahoma
1
Appalachian Mountains
1
Appalachian Region
3
Appalachian Trail
1
Arab countries
2
more ...