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Subject
- Building[remove]47
- City planning46
- United States. Works Progress Administration46
- Construction workers43
- Streets--Design and construction15
- Streets8
- Airports7
- Airports--Design and construction7
- Sewerage7
- Runways (Aeronautics)6
- Sea-walls--Design and construction6
- Construction equipment4
- Runways (Aeronautics)--Maintenance and repair4
- Sewage disposal4
- Sewage disposal plants4
- Forests2
- Steam shovels2
- Street maintenance & repair2
- Tractors2
- Airports--Planning1