Subject
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Pillar recovery
1
Pillars
1
Planning
2
Pollution
1
Pollution control
1
Potash
1
Power generation
1
Power plants
1
Processing
1
Production
3
Quality control
1
Radio equipment
1
Reclamation
8
Regulations
2
Research
1
Research and development
5
Rock bursts
3
Rock mechanics
1
Rock pressure
1
Roof control
1
Roofs
1
Royal commission
4
Royalties
1
Safety
11
Safety measures
1
Sampling
1
Sedimentary structures
1
Seismic methods
1
Shedden, Leslie
1
Shortwall mining
2
Small business
1
Socia-economic factors
1
Social impact
1
Soils
2
Standards
1
Statistics
1
Stratigraphy
1
Strip mining
5
Subsidence
1
Sulfur
1
Sulfur deposits
1
Surface mining
8
Surface water
1
Sydney Coalfield, N. S.
1
Sydney coalfield
1
Symposia
1
Synthetic fuels
1
Technology
2
Testing
1
Thermal power
2
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