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Subjects
- Aeronautics.1
- Airplanes.1
- Automobile industry and trade -- United States.1
- Automobile industry and trade.1
- Automobiles.1
- Balloon ascensions.1
- Balloons (Aircraft) -- 1910.1
- Bridges.1
- Buildings -- Michigan -- Detroit.1
- Commerce.1
- Engineering -- Study and teaching.1
- Engineering.1
- Engineers -- Michigan -- Ann Arbor.1
- Log-books.1
- Michigan -- Politics and government -- 1929-1938.1
- New Deal, 1933-1939 -- Michigan.1
- Parades and processions.1
- Presidents -- United States -- Election -- 1932.1
- Public utilities -- Valuation.1
- Public welfare -- Michigan.1