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Topic
- Dredges 16
- Forests and forestry 8
- Men 8
- Port of Portland (Or.) 5
- Bridges 3
- Bodies of water 2
- Dry docks 2
- Fishing boats 2
- Harbors 2
- Machinery 2
- Photography of interiors 2
- Shipyards 2
- Bridge construction industry 1
- Columbia River 1
- Docks 1
- Rivers 1
- Shipbuilding industry--Employees 1
- Ships 1
