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Subject
- Aerial surveys8
- Artillery32
- Auditoriums1
- Catholic church buildings2
- Civil engineers1
- Clippings (Books, newspapers, etc.)2
- Concrete1
- Concrete masonry1
- Concrete--Cracking2
- Conservation and restoration53
- Construction1
- Construction workers6
- Earthmoving machinery6
- Electric generators1
- Electrical engineering--Equipment and supplies1
- Engineering and construction83
- Engineering drawings15
- Floors, Concrete1
- Fort Moultrie (S.C.)86
- Fort Sumter National Monument (Agency : U.S.)12