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Subjects
- Conservation of natural resources -- Michigan.[remove]2
- Animals.1
- Authors, American -- Michigan.1
- Camping.1
- Conservation of material resources -- Michigan.1
- Dogsleds.1
- Energy conservation -- Michigan.1
- Environmental protection -- Michigan.1
- Fishing -- Canada.1
- Forest fires -- Michigan.1
- Groundwater -- Pollution -- Michigan.1
- Hazardous wastes -- Michigan.1
- Hunting -- Canada.1
- Hunting.1
- Indians of North America -- Domestic life.1
- Land use -- Michigan.1
- Log cabins.1
- Lumber industry.1
- Mines and mineral resources -- Michigan.1
- Motion picture industry.1