Topics
Economic conditions
Economic aspects
13
Hydroelectric power plants
9
Social conditions
6
Social aspects
5
Dams
4
Business enterprises
3
Economic forecasting
3
Economic surveys
3
Forecasting
3
Mathematical models
3
Population forecasting
3
Economic history
2
Household surveys
2
Planning
2
Regional economics
2
Sociological aspects
2
Appropriations and expenditures
1
Bus travel
1
Environmental aspects
1
Estimates
1
Finance
1
Municipal services
1
Social surveys
1
Telephone surveys
1
Transportation
1