Region
Adair County
1
Africa, Sub-Saharan
2
Argentina
4
Arkansas
2
Arkansas Delta (Ark.)
1
Asia
1
Brazil
2
Brazil, Northeast
1
California
13
Canada
5
Catskill Mountains
1
Chile
3
Colombia
4
Del Rey
2
Desha County
1
Desha County (Ark.)
1
Developing countries
1
Dodge County
2
Dodge County (Ga.)
1
Dodge County (Wis.)
1
Egypt
3
Essex (County)
1
Essex (Ont. : County)
1
Fairbury Region
1
Florida
1
Fort Madison Region
1
France
3
Gallipoli
1
Gem County
1
Georgia
2
Grasslands National Park (Sask.)
1
Greece
1
Hawaii
1
Huron
1
Idaho
1
Illinois
3
Indiana
1
Iowa
8
Ireland
3
Kentucky
5
Knox County
1
Lewis County
2
Lewis County (Wash.)
2
Loire River Valley
1
Loire River Valley (France)
1
Malawi
2
Manitoba
3
Marin County
1
Massachusetts
2
Mexico
1
more ...