Subjects
- Laborers.1
- Lakes.1
- Lighthouses -- Michigan.1
- Log cabins.1
- Logging -- Michigan.1
- Lumbering -- Michigan.1
- Lumberman's Memorial (Iosco County, Mich.)1
- Mammals -- Michigan.1
- Manufactures -- Michigan.1
- Mines and mineral resources -- Michigan.1
- Mining.1
- Monuments and memorials.1
- Motion picture industry.1
- National parks and reserves -- United States.1
- National parks and reserves.1
- Natural resources -- Michigan.1
- Natural resources -- United States.1
- Natural resources.1
- Oral history.1
- Pesticides.1