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Donor
- Laylin, John G. (John Gallup), 1902- 32
Topic
- Politics and government 32
- Water-supply 32
- Laylin, John G. (John Gallup), 1902- 13
- Canals 1
- Dams 1
- Irrigation 1
- Treaties 1
Region
- Afghanistan 28
- Iran 28
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