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Donor
- Laylin, John G. (John Gallup), 1902- 51
Topic
- Water-supply 37
- Politics and government 30
- Laylin, John G. (John Gallup), 1902- 16
- Irrigation 12
- Agriculture 6
- Dams 6
- Canals 4
- Treaties 4
- Amini, Ali 3
- Qanats 2
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Region
- Iran 51
- Afghanistan 50
- United States 2
- United Kingdom 1
Water Basin
- Helmand Rōd >> Afghanistan 51
Language
- English 51