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Subject
- National parks and reserves13
- United States. National Park Service7
- Historic sites6
- Lincoln, Abraham, 1809-18656
- Historic buildings2
- Parks2
- Caves1
- Central High School (Little Rock, Ark.)1
- Conservation of natural resources1
- Cultural landscapes1
- Discrimination in employment1
- Land and Water Conservation Fund Grant Assistance Program (U.S.)1
- Land use1
- Landscape architecture1
- Landscape assessment1
- Limnology1
- Lincoln Memorial (Washington, D.C.)1
- Lincoln Museum (Washington, D.C.)1
- Memorials1
- Modoc War, 1872-18731