Topics
Economic aspects
10
Hydroelectric power plants
7
Economic conditions
6
Business enterprises
4
Climate
3
Dams
3
Economic surveys
3
Electric power transmission
3
Forecasting
3
Freezes (Meteorology)
3
Household surveys
3
Hydrology
3
Ice
3
Ice on rivers, lakes, etc
3
Measurement
3
Planning
3
Climatology
2
Costs
2
Electric power consumption
2
Electric power production
2
Electric utilities
2
Interconnected electric utility systems
2
Social aspects
2
Sociological aspects
2
Stream measurements
2
Bus travel
1
Dissolved oxygen
1
Economic forecasting
1
Economics
1
Electric lines
1
Households
1
Population forecasting
1
Social conditions
1
Social surveys
1
Transportation
1
Trappers
1
Trapping
1
Trapping surveys
1
Water
1
Water quality
1