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Creator
- Oregon Journal (Firm) 7
- Oregonian (Firm) 7
- Headlight-Herald 2
- Izaak Walton League of America 2
- Oregon City Enterprise Courier (Oregon City, Or.) 2
- Grants Pass Daily Courier 1
- Independence Enterprise (Independence, Or.) 1
- Los Angeles Herald-Examiner 1
- Oregon Wildlife Federation 1
- Oregon. State Board of Health 1
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Topic
- Water--Pollution 18
- Rivers--Oregon 17
- Dams 5
- Sewage disposal plants 5
- Izaak Walton League of America 4
- Fishes--Conservation 3
- Flood control 3
- Food processing plants 2
- Algae 1
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Region
- Willamette River >> Multnomah County >> Oregon >> United States 15
- Portland >> Washington County >> Oregon >> United States 6
- Linn County >> Oregon >> United States 3
- Rogue River >> Curry County >> Oregon >> United States 3
- Columbia River >> Clatsop County >> Oregon >> United States 2
- Marion County >> Oregon >> United States 2
- Woodburn >> Marion County >> Oregon >> United States 2
- Clackamas River >> Clackamas County >> Oregon >> United States 1
- Jennings Lodge >> Clackamas County >> Oregon >> United States 1
- Marks Slough >> Linn County >> Oregon >> United States 1
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Type
- Text 12
- Image 5
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Decade
- 1940-1949 18