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Creator
- Oregonian (Firm) 7
- Oregon Journal (Firm) 5
- Grants Pass Daily Courier 1
- Headlight-Herald 1
- Independence Enterprise (Independence, Or.) 1
- Izaak Walton League of America 1
- Los Angeles Herald-Examiner 1
- Oregon City Enterprise Courier (Oregon City, Or.) 1
- St. Louis Globe-Democrat 1
- Statesman Journal 1
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Topic
- Rivers--Oregon 7
- Water--Pollution 7
- Dams 3
- Sewage disposal plants 3
- Fishes--Conservation 2
- Flood control 2
- Izaak Walton League of America 2
- Lectures and lecturing 1
- Motion pictures 1
- National parks and reserves 1
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Region
- Willamette River >> Multnomah County >> Oregon >> United States 6
- Portland >> Washington County >> Oregon >> United States 4
- Rogue River >> Curry County >> Oregon >> United States 2
- Clackamas River >> Clackamas County >> Oregon >> United States 1
- Columbia River >> Clatsop County >> Oregon >> United States 1
- Jennings Lodge >> Clackamas County >> Oregon >> United States 1
- Santiam River >> Marion County >> Oregon >> United States 1
- Tillamook >> Tillamook County >> Oregon >> United States 1
- Yellowstone National Park >> Park County >> Wyoming >> United States 1
Decade
- 1940-1949 7