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Topic
- Bodies of water 13
- Rivers 13
- United States. Congress--Records and correspondence 13
- West (U.S.) 13
- River engineering 12
- River surveys 12
- Harbors 11
- River channels 10
- Canals 3
- Rapids 3
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Region
- Columbia River >> Douglas County >> Washington >> United States 13
- Oregon >> United States 13
- Washington >> United States 13
- Willamette River >> Multnomah County >> Oregon >> United States 13
- California >> United States 9
- Snake River >> Franklin County >> Washington >> United States 9
- Coos Bay >> Coos County >> Oregon >> United States 7
- Idaho >> United States 6
- San Francisco Bay >> San Mateo County >> California >> United States 6
- Clearwater River >> Nez Perce County >> Idaho >> United States 5
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Format
- application/pdf 13
Institution
- University of Oregon 13