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Subjects
- Building materials.1
- Classrooms -- Michigan -- Ann Arbor.1
- Concrete construction.1
- Construction industry -- New York (State) -- New York.1
- Engineers -- Michigan -- Ann Arbor.1
- Fluid dynamics.1
- Fluid mechanics.1
- Helicopters -- American.1
- Immigrants -- United States.1
- Machinery.1
- Prohibition -- United States.1
- Teachers -- Michigan -- Ann Arbor.1
- Water-supply.1
- World War, 1939-1945 -- Personal narratives, American.1