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Subject
Economy
9
Minerals
9
Geoscientific Information
8
Mines and mineral resources
8
Iron
4
Rhenium
4
Cobalt
3
Molybdenum
3
Nickel
3
Aggregates (Building materials)
2
Beryllium
2
Chromium
2
Cobalt mines and mining
2
Copper
2
Gold
2
Iron industry and trade
2
Lead
2
Manganese
2
Molybdenum mines and mining
2
Nickel mines and mining
2