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Subjects
- Lumber industry.4
- Bridges.3
- World War, 1914-1918.3
- Business records.2
- Camping.2
- Canals.2
- Civil engineering.2
- Conservation of natural resources -- Michigan.2
- Dogsleds.2
- Exhibitions.2
- German Americans -- Michigan.2
- Harbors.2
- Iron mining.2
- Logging -- Michigan.2
- Mining.2
- Ojibwa Indians.2
- Photographs shelf.2
- Quarrying.2
- Steamboats.2
- Strikes and lockouts -- Michigan.2