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- Lectures and lecturing 7
Region
- Upper Klamath National Wildlife Refuge >> Klamath County >> Oregon >> United States 2
- Willamette Valley >> Multnomah County >> Oregon >> United States 2
- California >> United States 1
- Crater Lake >> Klamath County >> Oregon >> United States 1
- Lower Klamath National Wildlife Refuge >> Siskiyou County >> California >> United States 1
- Oregon Coast >> Oregon >> United States 1
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- Rogue River >> Curry County >> Oregon >> United States 1
- Three Arch Rocks National Wildlife Refuge >> Tillamook County >> Oregon >> United States 1
Decade
- 1900-1909 7
