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Subjects
- Engineers -- Michigan.[remove]8
- Engineering.3
- Bridges -- Michigan.2
- Offices.2
- World War, 1939-1945.2
- Aeronautics.1
- Agriculture -- Michigan -- Washtenaw County.1
- Airports -- Michigan.1
- Automobile industry and trade -- Michigan.1
- Automobile industry and trade -- United States.1
- Automobile industry.1
- Automobiles -- Design and construction.1
- Boat and ship industry.1
- Bridge construction -- Michigan.1
- Bridges -- Design and construction -- Michigan.1
- Cement.1
- Civil Engineering.1
- Construction industry -- Michigan -- Ecorse.1
- Deep diving -- Great Lakes (North America) -- History -- 20th century.1
- Deep diving -- United States -- History -- 20th century.1