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Creator
- Rosenthal, Abraham, 1870-1929 1
- Warren, George C., 1877- 1
Topic
- Bridges 1
- Highway engineering 1
- Mountains 1
- Northwest, Pacific 1
- Photography 1
- Riparian areas 1
- Rivers 1
- Scenic byways 1
- Tunnels 1
- Waterfalls 1
Region
- Columbia River >> Clatsop County >> Oregon >> United States 1
- Eagle Creek >> Clackamas County >> Oregon >> United States 1
- Horsetail Falls >> Multnomah County >> Oregon >> United States 1
- Multnomah Falls >> Multnomah County >> Oregon >> United States 1
- Oneonta Gorge >> Multnomah County >> Oregon >> United States 1