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Subjects
- Mining.2
- World War, 1914-1918.[remove]2
- Astronomical observatories.1
- Business enterprises -- Michigan -- Saginaw.1
- Business records.1
- Camping.1
- Coal mining.1
- Conservation of natural resources -- Michigan.1
- Elections -- Michigan -- 1936.1
- Engineering.1
- Engineers -- Michigan -- Ann Arbor.1
- Fish.1
- Fishing -- Michigan.1
- Fishing.1
- Forests and forestry -- Michigan.1
- Grayling fishing.1
- Hunting -- Michigan.1
- Hunting.1
- Industry and education.1
- Laboratories.1