Topics
Economic aspects
23
Hydroelectric power plants
23
Dams
13
Social aspects
11
Economic conditions
9
Forecasting
8
Business enterprises
4
Economic forecasting
4
Economic surveys
4
Population forecasting
4
Social conditions
4
Appropriations and expenditures
3
Electric power
3
Electric power consumption
3
Planning
3
Prices
3
Transportation
3
Air travel
2
Design and construction
2
Economic history
2
Mathematical models
2
Regional economics
2
Access roads
1
Bus travel
1
Economics
1
Electric power production
1
Estimates
1
Expenditures, Public
1
Finance
1
Highway planning
1
Household surveys
1
Households
1
Roads
1
Route surveying
1