Subject
Coal
15
Coal mining
11
Field trips
9
Coal Mines
8
Geology
8
Coal fields
7
Environmental impacts
7
Guidebooks
7
Sydney coalfield
7
Airborne methods
6
Geophysical profiles
6
Geophysical surveys
6
History
6
Mining
6
Stratigraphy
6
Electric power
5
Emissions
5
Beneficiation
4
Electromagnetic waves
4
Environmental assessment
4
Feasibility studies
4
Gamma ray spectrometry
4
Land use
4
Magnetic Survey maps
4
Maps
4
Meguma Group
4
Mine development
4
Radiometric methods
4
Safety
4
Ash
3
Biogeochemical methods
3
Carboniferous
3
Coal deposits
3
Coal gasification
3
Combustion
3
Environment
3
Forestry
3
Geochemistry
3
Gold ores
3
Methane
3
Mineral exploration
3
Minerals
3
Power generation
3
Soil surveys
3
Wilderness areas
3
coal waste dump reclamation
3
exploration activities
3
Analysis
2
Basins
2
Bituminous coal
2
more ...