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Donor
- Laylin, John G. (John Gallup), 1902- 12
Topic
- Water-supply 7
- Politics and government 5
- Irrigation 4
- Canals 3
- Dams 3
- Agriculture 2
- Desertification 1
- Hari Rud 1
- Qanats 1
- Treaties 1
Region
- Afghanistan 10
- Iran 10
- Russia 2
- Mexico >> North America 1
- United States 1
Type
- Text 12
Decade
- 1940-1949 12