Region
United States
463
New York (State)
56
États-Unis
10
New York
6
Canada
3
Soviet Union
3
Tennessee River Valley
3
Africa, Sub-Saharan
2
China
2
Foreign countries
2
Japan
2
AMERICA
1
AMERICA DEL NORTE
1
AMERICA DEL SUR
1
ARQUEOLOGIA AMERICANA
1
Adirondack Park
1
Adirondack Park (N.Y.)
1
Africa
1
America
1
Amérique
1
Amérique du Nord
1
Amérique du Sud
1
Atlantic Coast (Canada)
1
Atlantic Coast (U.S.)
1
Atlantic coast (North America)
1
Belgium
1
California
1
Europe
1
France
1
Great Britain
1
Gulf Coast
1
Gulf States
1
Hudson River Estuary (N.Y. and N.J.)
1
Kanada
1
Mississippi River Watershed
1
North America
1
OECD countries
1
Pacific Islands (Trust Territory)
1
Poplar River Watershed (Sask. and Mont.)
1
South America
1
South Carolina
1
Sovjet-Unie
1
Texas
1
USA
1
Verenigde Staten
1
West Indies
1