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Dams
Economic aspects
12
Economic conditions
Hydroelectric power plants
Social aspects
6
Social conditions
6
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4
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4
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4
Human services
4
Power utilization
4
Public goods
4
Research
4
Sociological aspects
4
Forecasting
3
Population forecasting
3
Electric power
2
Appropriations and expenditures
1
Bus travel
1
Estimates
1
Finance
1
Mathematical models
1
Planning
1
Transportation
1