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Creator
- Niger 16
- Mali 12
- Nigeria 12
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- Chad 9
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- Guinea 7
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- Upper Volta 6
- Burkina Faso 4
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Region
- Republic of Niger 15
- Mali 12
- Nigeria 12
- Burkina Faso 10
- Republic of Benin 10
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- Republic of Chad 9
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Water Basin
- Niger River >> Nigeria 12
- Niger 12
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- Lake Chad 2
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- Volta 1
Institution
- Oregon State University 16