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Creator
- Portland Chamber of Commerce (Or.) 14
- Oregonian (Firm) 10
- Oregon Journal (Firm) 9
- Altoona Tribune 1
- Chicago Congregational Club 1
- City Club of Portland (Portland, Or.) 1
- Detroit Institute of Arts 1
- News-Telegram (Portland, Or.) 1
Topic
- Lectures and lecturing 14
- Birds--Conservation 2
- Rivers--Oregon 2
- Water--Pollution 2
- Wildlife refuges 2
- Coyote 1
- Elk 1
- Hawks 1
- Hunting 1
- Scientific expeditions 1
Region
- Malheur National Wildlife Refuge >> Harney County >> Oregon >> United States 2
- Willamette River >> Multnomah County >> Oregon >> United States 2
- Alaska >> United States 1
- Chicago >> Cook County >> Illinois >> United States 1
- Detroit >> Wayne County >> Michigan >> United States 1
- Lower Klamath National Wildlife Refuge >> Siskiyou County >> California >> United States 1
Decade
- 1930-1939 14