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Creator
- Greece 2
- Bulgaria 1
- Yugoslavia 1
Water Basin
- Struma River 2
- Struma 2
- Lake Prespa 1
- Lake Prespa 1
- Maritsa River 1
- Maritsa 1
- Mesta 1
- Nestos 1
- Vardar River 1
- Vardar 1
Rights
- No Copyright - United States 2
Institution
- Oregon State University 2