Columbia subject headings:
Historic sites--Conservation and restoration--United States.
Landscape design--United States--History.
United States. National Park Service--History.
Harvard subject headings:
Historic sites--Conservation and restoration--United States
Landscape design--United States--History.
United States. National Park Service--History.
Princeton subject headings:
Landscape design--United States--History.
National parks and reserves--United States--Design--History.
Park facilities--United States--Design and construction--History.
Parks--United States--Design and construction--History.
United States. National Park Service--History.