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Topic
- Lectures and lecturing 25
- Rivers--Oregon 25
- Dams 18
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- Water--Pollution 7
- Salmon 4
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- Conservation of natural resources 1
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Region
- Willamette River >> Multnomah County >> Oregon >> United States 25
- Portland >> Washington County >> Oregon >> United States 3
- Columbia River >> Clatsop County >> Oregon >> United States 2
- New York >> New York >> United States 2
- Santiam River >> Marion County >> Oregon >> United States 2
- Alaska >> United States 1
- Bonneville Dam >> Multnomah County >> Oregon >> United States 1
- Grand Coulee Dam >> Okanogan County >> Washington >> United States 1
- McKenzie River >> Lane County >> Oregon >> United States 1
Collection
- OSU Special Collections & Archives Research Center 25
- Reuniting Finley and Bohlman 25