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Subjects
- Agriculture.1
- Classrooms -- Michigan -- Ann Arbor.1
- Demonstrations -- Michigan -- Ann Arbor.1
- Erosion.1
- Industrial buildings.1
- Industry.1
- Labor laws and legislation -- United States.1
- Laborers.1
- Law enforcement -- United States.1
- Pickets.1
- Police -- Michigan.1
- Strikes and lockouts -- United States.1
- Strikes.1
- Student registration.1
- Trade-unions -- Corrupt practices -- United States.1
- Vandalism.[remove]2