Subject
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Copper
3
Copper mines and mining
1
Copper ores
1
Cordilleran orogeny
2
Cordundum deposits
1
Cores
1
Corporations
1
Cost
2
Country life
1
Coyote
1
Crown land
7
Crown lands
8
Crust
1
Damage
1
Data processing
1
Dead trees
1
Deer
2
Deer hunting
1
Delegated legislation
1
Description and travel
5
Design and construction
1
Development
1
Diamonds
1
Dictionaries
8
Dimension stone
1
Direction
1
Directory
9
Diseases
1
Diseases and pests
4
Dolomites
1
Doors
1
Drift
1
Drillholes
3
Drilling
1
Earth sciences
2
Earth scientists
1
Earthquakes
1
Eastern coyote
1
Ecology
3
Economic aspects
4
Economic conditions
7
Economic geology
12
Economic history
3
Economic minerals
2
Economics
3
Ecoregions
3
Ecosystem management
1
Education
3
Electrical engineering
1
Electromagnetic methods
4
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