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Donor
- Naff, Thomas 3
Topic
- Salinity 3
- Soils 3
- Agriculture 2
- Water quality 2
- Watersheds 2
- Drainage 1
- Gypsum 1
- Precipitation (Meteorology) 1
- Sand 1
- United Arab Republic 1
Water Basin
- River Nile >> Sudan 3
Publisher
- Food and Agriculture Organization of the United Nations 3