Region
Africa
2
Africa, East
1
Alabama
1
Algeria
2
Appalachian Region
1
Argentina
1
Arkansas
2
Ban Chiang (Udon Thani)
1
Ban Chiang (Udon Thani, Thailand)
1
Berlin
1
Berlin (Germany)
2
Bolivia
2
Boston
3
Brevard County (Fla.)
1
Bronx (New York, N.Y.)
1
California
1
Canada
3
Canterbury
1
Chicago
3
Chicago (Ill.)
1
China
4
Christian County
2
Columbus
1
Columbus (Ind.)
1
Congo (Democratic Republic)
1
Connecticut
1
Cuba
4
Czech Republic
1
Dallas
2
Dallas (Tex.)
1
Delaware
2
Developing countries
3
Developing countrires
1
Drama
1
Egypt
1
Europe
3
Finland
1
Florida
6
France
2
Georgia
1
Germany
6
Germany (East)
1
Germany (West)
3
Gibraltar, Strait of
1
Great Britain
11
Greece
1
Hawaii
1
Illinois
3
India
2
Indiana
1
more ...