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Topic
- Northwest, Pacific 17
- River channels 17
- River engineering 17
- Rivers 15
- Bodies of water 13
- United States. Congress--Records and correspondence 13
- River surveys 12
- Canals 10
- Rapids 8
- United States--Armed Forces--Organization--Charts, diagrams, etc 8
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Region
- Oregon >> United States 16
- Columbia River >> Douglas County >> Washington >> United States 13
- Willamette River >> Multnomah County >> Oregon >> United States 13
- Snake River >> Franklin County >> Washington >> United States 12
- Washington >> United States 12
- Coos Bay >> Coos County >> Oregon >> United States 5
- Columbia River >> Clatsop County >> Oregon >> United States 4
- Nehalem River >> Tillamook County >> Oregon >> United States 2
- California >> United States 1
- Clearwater River >> Nez Perce County >> Idaho >> United States 1
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Language
- English 17
Type
- Text 15
- Collection 2
Collection
- Western Waters Digital Library 17