Region
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Andes Region
3
Belize
3
Brazil
3
Casma River Valley
3
Casma River Valley (Peru)
3
Cedar Rapids (Iowa)
3
Colorado
3
Columbus (Ga.)
3
Costa Rica
3
Council Bluffs
3
Council Bluffs (Iowa)
3
Hamilton County
3
Hamilton County (Kan.)
3
Harlem (New York, N.Y.)
3
Hollywood (Los Angeles, Calif.)
3
Iowa City (Iowa)
3
Ireland
3
Latin America
3
Louisiana
3
Northwest Territories
3
Okoboji Lakes Region
3
Okoboji Lakes Region (Iowa)
3
Rivas Site (Costa Rica)
3
Russia
3
Salem (Mass.)
3
San Isidro de El General Region
3
San Isidro de El General Region (Costa Rica)
3
South Carolina
3
Altiplano
2
Amazon River Region
2
Ancash
2
Ancash (Peru)
2
Angelina River Valley
2
Angelina River Valley (Tex.)
2
Antarctica
2
Arkansas
2
Asia
2
Aurora
2
Australia
2
Bengal
2
Boston
2
Cahuachi Site (Peru)
2
Callachaca Site (Peru)
2
Chicago (Ill.)
2
Chile
2
Clayton County
2
Clayton County (Iowa)
2
Connecticut
2
Cuba
2
Czech Republic
2
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