Region
prev ...
New York Metropolitan Area
1
New Zealand
4
Nigeria
2
Nile River Watershed
1
North America
6
North Carolina
3
Northern Ireland
1
OECD countries
3
Ontario
1
Oregon
1
Outer space
2
Pacific Area
3
Pakistan
18
Palestine
1
Pa⩳es de la Comunidad Econ⯭ica Europea
1
Pennsylvania
1
Pennsylvanie
1
Persian Gulf Region
3
Petroleum industry and trade
1
Philadelphia
1
Philadelphie
1
Poland
1
Puerto Rico
2
Pāṭa
2
Rocky Mountains Region
1
Romania
1
Russia
3
Russia (Federation)
32
Rwanda
2
Saint Lawrence River
1
Saint Lawrence Seaway
1
Saudi Arabia
6
Shanghai
1
Shanghai (China)
1
Siberia
1
Siberia (Russia)
1
Singapore
1
South Africa
5
South America
2
South Asia
5
Southeast Asia
7
Southern States
1
Soviet Union
38
Sudan
4
Sweden
2
Syria
4
Taiwan
10
Toronto Metropolitan Area
1
Toronto Metropolitan Area (Ont.)
1
Turkey
7
more ...