Subject
Absolute age
1
Accidents
1
Acid mine drainage
1
Aerial surveys
1
Aggregate
1
Air pollution
1
Air quality
1
Airborne methods
6
Analysis
2
Appalachian orogeny
1
Aquifers
1
Ash
3
Avalon zone
1
Balsam fir
1
Bark
1
Basins
2
Beaverdam Gold Deposit
1
Beneficiation
4
Biogeochemical methods
3
Bituminous coal
2
Cambrian
1
Canadian newspapers (English)
1
Cape Breton Coalfield, N. S.
2
Cape Breton Coalfields, N. S.
2
Carboniferous
3
Carbonization
1
Celestite
1
Chemical analysis
1
Chemical properties
1
Clean coal
1
Coal
15
Coal Mines
8
Coal deposits
3
Coal fields
7
Coal gasification
3
Coal mines
1
Coal mines and mining
1
Coal mining
11
Coal preparation
2
Coal quality
1
Coal reserves
1
Coal trade
1
Coal utilization
1
Coal waste dump reclamation
1
Coalbed methane
1
Coastlines
1
Collecting
1
Combustion
3
Computer Programs
1
Computer modeling
1
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