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Donor
- Laylin, John G. (John Gallup), 1902- 27
Topic
- Water-supply 27
- Politics and government 20
- Laylin, John G. (John Gallup), 1902- 15
- Irrigation 4
- Amini, Ali 2
- Dams 2
- Treaties 2
- Canals 1
- Tipton, R. J. (Royce J.), 1893- 1
Region
- Afghanistan 25
- Iran 25
- United States 2
- Egypt 1
- Iraq 1
- Turkey 1
- United Kingdom 1
Decade
- 1950-1959 27