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Subjects
- Iron industry.[remove]3
- Ships -- Great Lakes.3
- Camping.2
- Tunnels.2
- Agricultural machinery.1
- Boats.1
- Bridges.1
- Business records.1
- Construction industry.1
- Copper mining.1
- Dams.1
- Expeditions and surveys.1
- Farms.1
- Ferries.1
- Forests and forestry -- Michigan -- Maps.1
- Fraternities and sororities.1
- Freedom Train.1
- German Americans -- Michigan.1
- Guards.1
- Harbors.1