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Creator
- Oregon Journal (Firm) 6
- Oregonian (Firm) 6
- Oregon City Enterprise Courier (Oregon City, Or.) 2
- Headlight-Herald 1
- Independence Enterprise (Independence, Or.) 1
- Izaak Walton League of America 1
- Los Angeles Herald-Examiner 1
- Oregon. State Board of Health 1
- Sherwood Valley News (Sherwood, Or.) 1
- St. Louis Globe-Democrat 1
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Topic
- Rivers--Oregon 15
- Water--Pollution 15
- Sewage disposal plants 5
- Dams 4
- Flood control 3
- Fishes--Conservation 2
- Food processing plants 2
- Izaak Walton League of America 2
- Lectures and lecturing 1
- Oregon Audubon Society 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
- 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
- Rogue River >> Curry County >> Oregon >> United States 1
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Type
- Text 9
- Image 5
- Moving Image 1
Decade
- 1940-1949 15