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Topic
- Dams 12
- Dams--Design and construction 11
- Photography 10
- Men 9
- Reservoirs 8
- Trenches 7
- Dinghies 5
- Scaffolding 5
- Construction workers 4
- Earth dams 3
- Horse-drawn vehicles 3
- Recreation areas--Public use 3
- Rivers 3
- Rocks 3
- Spectators 3
- Watchtowers 3
- Construction 2
- Horses 2
- Landscapes 2
- Portraits, Group 2