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Subject
Inland navigation
3
Nautical charts
3
Oceans
3
Rivers
3
Street-railroads
3
American Indians
2
Battle of Bull Run
2
Cartouches
2
Colonies
2
Copper mines
2
Election districts
2
Fortification
2
Geomagnetism
2
Military bases
2
Pictorial maps
2
Postal service
2
Public lands
2
School districts
2
Schools
2
Shipping maps
2