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Topic
- Bodies of water 7
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- River surveys 7
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- United States. Congress--Records and correspondence 7
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Region
- California >> United States 7
- Columbia River >> Douglas County >> Washington >> United States 7
- Oregon >> United States 7
- San Francisco Bay >> San Mateo County >> California >> United States 7
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- Willamette River >> Multnomah County >> Oregon >> United States 7
- Coos Bay >> Coos County >> Oregon >> United States 3
- Snake River >> Franklin County >> Washington >> United States 3
- Clearwater River >> Nez Perce County >> Idaho >> United States 2
- Idaho >> United States 2
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