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Topic
- Water-supply 38
- Politics and government 21
- Laylin, John G. (John Gallup), 1902- 17
- Irrigation 11
- Agriculture 5
- Dams 5
- Treaties 5
- Water diversion 5
- Amini, Ali 4
- Building 4
- Canals 3
- Negotiation 2
- Rivers 2
- Meetings 1
- Technical assistance 1
- Tipton, R. J. (Royce J.), 1893- 1
- Water quality 1
- Water-power 1