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Creator
- Oregon Journal (Firm) 222
- Oregonian (Firm) 99
- Finley, William L. (William Lovell), 1876-1953 32
- Averill, Edgar F., 1881-1955 25
- Portland Chamber of Commerce (Or.) 13
- Oregon City Enterprise Courier (Oregon City, Or.) 9
- University of California, Berkeley 9
- Finley, Irene 8
- Statesman Journal 7
- News-Telegram (Portland, Or.) 6
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Topic
- Lectures and lecturing 90
- Rivers--Oregon 74
- Dams 50
- Water--Pollution 32
- Salmon 31
- Wildlife refuges 23
- Fishes--Conservation 22
- Birds--Conservation 21
- Hunting 18
- Flood control 17
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Region
- Willamette River >> Multnomah County >> Oregon >> United States 47
- Columbia River >> Clatsop County >> Oregon >> United States 29
- Malheur National Wildlife Refuge >> Harney County >> Oregon >> United States 14
- Portland >> Washington County >> Oregon >> United States 12
- Lower Klamath National Wildlife Refuge >> Siskiyou County >> California >> United States 10
- Alaska >> United States 8
- Bonneville Dam >> Multnomah County >> Oregon >> United States 7
- Santiam River >> Marion County >> Oregon >> United States 7
- Tule Lake National Wildlife Refuge >> Siskiyou County >> California >> United States 7
- Clear Lake National Wildlife Refuge >> Modoc County >> California >> United States 3
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Institution
- Oregon State University 222
