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Subject
- United States. Works Progress Administration[remove]10
- Building8
- City planning7
- Construction workers7
- Airports4
- Airports--Design and construction4
- Runways (Aeronautics)4
- Runways (Aeronautics)--Maintenance and repair4
- Sewage disposal3
- Sewerage3
- Artists2
- Painting2
- Tractors2
- Sewage disposal plants1
- Streets1
- Streets--Design and construction1