Columbia subject headings:
Harvard subject headings:
Dumbarton Oaks Park (Washington, D.C.)
Landscape assessment--Washington (D.C.)
Washington (D.C.)--Description and travel
Princeton subject headings:
Cultural property--Protection--Washington (D.C.).
Dumbarton Oaks Park (Washington, D.C.)
Gardens--Washington (D.C.)
Landscapes--Washington (D.C.).
Parks--Washington (D.C.)
Rock Creek Park (Washington, D.C.)