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- Douglas fir 53
- Birds--Nests 13
- Hummingbirds 6
- Lumber trade 6
- American robin 5
- Greenhouses 5
- Logging 5
- Oregon Forest Products Laboratory 5
- Seedlings 5
- Thrushes 5
- Trees 5
- Waxes 5
- Laboratories 4
- Birds--Eggs 3
- Forests and forestry 3
- Log transportation 3
- Portraits, Group 3
- Timber 3
- Brick roads 2
- Corporations--Charitable contributions 2
