Region
Africa
4
Alabama
2
Alaska
1
America
2
Appalachian Region
1
Arizona
1
Asia
1
Australia
3
Austria
1
Baltimore
1
Bangladesh
1
Belmont (Mass.)
1
Boston
2
Boston Metropolitan Area
1
Botswana
1
Brazil
1
Burma
2
California
11
Canada
12
Caucasus
1
China
10
Colorado
17
Colorado Springs
1
Congo (Democratic Republic)
1
Connecticut
1
Cuba
1
Denver
3
Detroit
2
Developing countries
5
East Asia
2
England
12
Europe
11
Four Corners Region
1
France
8
Germany
1
Ghana
1
Great Basin
1
Great Britain
31
Great Plains
1
Greece
1
Halstead (Kan.)
1
Hawaii
1
Hiroshima-shi
1
Hiroshima-shi (Japan)
2
Houston
1
India
1
Iowa
1
Iowa City
1
Italy
1
Japan
2
more ...