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Donor
- Laylin, John G. (John Gallup), 1902- 56
Topic
- Water-supply 37
- Politics and government 31
- Laylin, John G. (John Gallup), 1902- 16
- Irrigation 13
- Dams 9
- Canals 8
- Agriculture 7
- Treaties 4
- Amini, Ali 3
- Qanats 2
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Region
- Afghanistan 56
- Iran 54
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- United Kingdom 2
- United States 2
Institution
- Oregon State University 56