Region
Abqaiq
1
Afghanistan
15
Africa
20
Africa, North
1
Africa, Southern
1
Africa, West
3
Alaska
2
Antarctica
1
Arctic Ocean
1
Arctic regions
17
Argentina
1
Arizona
1
Asia
5
Asia, Central
66
Atlanta
1
Australia
1
Balkan Peninsula
4
Belarus
5
Boston
2
Boston Metropolitan Area
1
Bulgaria
2
Burma
3
Byzantine Empire
1
California
1
Canada
21
Canadian-American Border Region
2
Canal Zone
1
Caribbean Area
5
Caspian Sea Region
2
Caucasus, Northern
2
Central America
24
Central Asia
1
Chechni͡a
2
China
140
Colombia
3
Communist countries
2
Congo (Democratic Republic)
1
Connecticut
1
Cuba
7
Developing countries
8
East Asia
2
East Rutherford
1
Egypt
2
Eurasia
4
Europe
37
Europe, Eastern
5
European Economic Community countries
2
European Union countries
15
Finland
1
Florida
3
more ...