Topics
Climate
32
Climatology
25
Archaeological surveying
11
Antiquities
10
Ice on rivers, lakes, etc
8
Environmental aspects
7
Hydroelectric power plants
7
Hydrology
7
Ice mechanics
6
Geology
5
Temperature
5
Dams
4
Measurement
3
Alaska Natives
2
Economic aspects
2
Economic conditions
2
Economic history
2
Excavations (Archaeology)
2
Freezes (Meteorology)
2
Historic sites
2
Ice
2
Regional economics
2
Social aspects
2
Social conditions
2
Stream measurements
2
Air quality
1
Archaeological geology
1
Cultural property
1
Data processing
1
Design and construction
1
Ethnology
1
Geographic information systems
1
Geological surveys
1
Methodology
1
Paleontological excavations
1
Particles
1
Power utilization
1
Roads
1
Soil surveys
1
Soils
1