Region
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Mississippi River
2
Montana
1
Morocco
1
Nepal
1
Netherlands
1
New York
1
New York (N.Y.)
1
New York (State)
3
New Zealand
21
Nicaragua
1
North America
2
North Carolina
2
Northwest, Pacific
1
Ontario
2
Outer space
1
Panama
1
Papua New Guinea
1
Philippines
1
Potosi
2
Québec (Province)
2
Québec (Province)
3
Québec (Provinve)
1
Research Triangle
1
Russia
2
South Africa
1
Soviet Union
2
Sweden
1
Taiwan
1
Tennessee
1
Thailand
2
United States
2,586
Venezuela
1
Washington (D.C.)
117
Washington (State)
1
Wisconsin
2
États-Unis
1