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Donor
- Naff, Thomas 3
Topic
- Dams 3
- Agriculture 2
- Hydrology 2
- Silt 2
- Watersheds 2
- Contamination of environment 1
- Drainage 1
- Ecology 1
- Groundwater 1
- Irrigation 1
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Region
- Sudan 3
- Egypt 2
- South Sudan 1
Publisher
- Pergamon Press (Oxford, England) 3
Repository
- Oregon State University. Libraries 3