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Topic
- Izaak Walton League of America 4
- Rivers--Oregon 3
- Sewage disposal plants 3
- Water--Pollution 3
- Lectures and lecturing 2
- Conservation of natural resources 1
- Oregon Cavemen Inc. 1
- Portland Chamber of Commerce (Or.) 1
- Roads--Design and construction 1
Region
- Portland >> Washington County >> Oregon >> United States 4
- Columbia River >> Clatsop County >> Oregon >> United States 2
- Rogue River >> Curry County >> Oregon >> United States 2
- Tillamook >> Tillamook County >> Oregon >> United States 1
- Willamette River >> Multnomah County >> Oregon >> United States 1
Collection
- OSU Special Collections & Archives Research Center 4
- Reuniting Finley and Bohlman 4
