Subject
Coal
18
Coal fields
13
Coal mining
9
Geology
7
Sydney coalfield
7
Field trips
5
Land use
5
Environment
4
Offshore drilling
4
Paleobotany
4
Analysis
3
Bituminous coal
3
Carboniferous
3
Coal Mines
3
Coal deposits
3
Coal gasification
3
Coke ovens
3
Geochemistry
3
Guidebooks
3
Hydrogeology
3
Marine geology
3
Mining
3
Pollution
3
Air quality
2
Ash
2
Beneficiation
2
Coal seams
2
Economics
2
Electric power
2
Environmental aspects
2
Fauna
2
Flora
2
Fossils
2
Hazardous waste
2
History
2
Hydrocarbons
2
Land use policy
2
Maps
2
Minerals
2
Offshore exploration
2
Processing
2
Recreation
2
Research and development
2
Rock bursts
2
Sedimentary structures
2
Soil surveys
2
Stratigraphy
2
Tar ponds
2
Topography
2
Air pollution
1
more ...