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Creator
- Oregon City Enterprise Courier (Oregon City, Or.) 6
- Oregon Journal (Firm) 2
- Oregonian (Firm) 2
- The Daily Astorian 2
- Independence Enterprise (Independence, Or.) 1
- News-Register (McMinnville, Or.) 1
- Silverton Appeal-Tribune (Silverton, Or.) 1
- Stayton mail 1
- The Newberg Graphic 1
Topic
- Dams 6
- Flood control 6
- Rivers--Oregon 6
- Fishes--Conservation 2
- Salmon 2
- Irrigation 1
- Oregon Audubon Society 1
- Water--Pollution 1
Region
- Willamette River >> Multnomah County >> Oregon >> United States 6
- Santiam River >> Marion County >> Oregon >> United States 3
- McKenzie River >> Lane County >> Oregon >> United States 2
- Clackamas River >> Clackamas County >> Oregon >> United States 1
- Columbia River >> Clatsop County >> Oregon >> United States 1
- Portland >> Washington County >> Oregon >> United States 1
Decade
- 1940-1949 6
