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Subject
- Boats[remove]103
- United States--History--Civil War, 1861-186586
- H.L. Hunley (Submarine)49
- National Underwater and Marine Agency49
- Submarine disasters49
- Underwater archaeology49
- Fort Sumter National Monument (Agency : U.S.)40
- Historic sites39
- Docks25
- Conservation and restoration12
- Important bird areas9
- Wilderness areas9
- Congaree National Park (S.C.)8
- Old growth forests8
- Tourism8
- Swamps6
- Aerial surveys3
- Clippings (Books, newspapers, etc.)3
- Architectural photography2
- Fort Sumter (Charleston, S.C.)2