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Creator
- Henderson, Robert W. (Robert Wesley), 1914-2006 10
- Pander, Henk, 1937- 4
- United States. Agricultural Stabilization and Conservation Service 2
- Al-Muhandis, Majid H. 1
- Beaumont, Peter, 1940- 1
- Doerksen, Harvey R. 1
- Geological Survey (U.S.) 1
- Harza Engineering Company 1
- Iraq. Dāʼirat al-Iḥṣāʼ al-Markazīyah 1
- Trotter, Claire 1
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Topic
- Rivers 25
- Dams 5
- Bodies of water 4
- Laboratories 4
- Landscape painting 4
- Nature 4
- Northwest, Pacific 4
- Painting 4
- River life 4
- Santiam River, North Fork (Or.) 4
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Region
- Oregon >> United States 8
- Corvallis >> Benton County >> Oregon >> United States 4
- Tillamook District, Oregon Department of Forestry >> Tillamook County >> Oregon >> United States 4
- Idaho >> United States 3
- Columbia River >> Clatsop County >> Oregon >> United States 2
- Columbia River >> Douglas County >> Washington >> United States 2
- Iraq 2
- Jordan 2
- Washington >> United States 2
- Marion County >> Oregon >> United States 1
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Decade
- 1970-1979 25