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Topic
Mines and mineral resources
5
Mining engineering
5
Hydraulic mining
3
Marching bands
3
Portraits, Group
3
School buildings
3
Students
3
Teachers
3
Buildings
2
Children
1
Chimneys
1
Crops
1
Dirt roads
1
Dwellings
1
Furnaces
1
Log cabins
1
Men
1
Metals--Refining
1
Mine tools
1
Mineral industries
1
