Subject
- Public lands -- United States2
- Public lands -- United States -- Statistics2
- Aquatic resources conservation -- Pacific States1
- Colorado -- History1
- Conservation of natural resources -- United States1
- Forest conservation -- United States1
- Forest management -- Oregon1
- Forest management -- Pacific States1
- Frontier and pioneer life -- Colorado1
- Land use -- Oregon -- Statistics1
- Land use -- United States1
- Land use -- Washington (State) -- Statistics1
- Lewis and Clark Expedition (1804-1806)1
- Northwest Forest Plan (U.S.)1
- Oregon and California Railroad -- History1
- Outdoor recreation -- United States1
- Public lands -- Oregon1
- Railroad land grants -- Oregon1
- Railroads -- California -- History1
- Railroads -- Oregon -- History1