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Topic
- Fishing 29
- Water quality 9
- Natural resources--Co-management 7
- Rivers 5
- Nasser, Lake (Egypt and Sudan) 4
- Aswan High Dam (Egypt) 3
- Bureaucracy 3
- Demography 3
- Northwest, Pacific 3
- Photography 3
- Water boundaries 3
- Agriculture 2
- Aquaculture 2
- Bodies of water 2
- Drawings 2
- Economics 2
- Explorers 2
- Fishwheels 2
- Irrigation 2
- Mountains 2
