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Creator
- Oregon Journal (Firm) 74
- Oregonian (Firm) 39
- Finley, William L. (William Lovell), 1876-1953 6
- Oregon City Enterprise Courier (Oregon City, Or.) 6
- Statesman Journal 5
- Portland Chamber of Commerce (Or.) 4
- Averill, Edgar F., 1881-1955 3
- The Register-Guard 3
- Albany Democrat-Herald 2
- Izaak Walton League of America 2
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Topic
- Rivers--Oregon 74
- Dams 43
- Water--Pollution 29
- Salmon 20
- Fishes--Conservation 18
- Flood control 17
- Lectures and lecturing 17
- Izaak Walton League of America 8
- Inland water transportation 7
- Sewage disposal plants 6
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Region
- Willamette River >> Multnomah County >> Oregon >> United States 47
- Columbia River >> Clatsop County >> Oregon >> United States 29
- Santiam River >> Marion County >> Oregon >> United States 7
- Portland >> Washington County >> Oregon >> United States 6
- Bonneville Dam >> Multnomah County >> Oregon >> United States 4
- Alaska >> United States 3
- McKenzie River >> Lane County >> Oregon >> United States 3
- Malheur National Wildlife Refuge >> Harney County >> Oregon >> United States 2
- Rogue River >> Curry County >> Oregon >> United States 2
- Sweet Home >> Linn County >> Oregon >> United States 2
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Institution
- Oregon State University 74