Columbia subject headings:
Harvard subject headings:
Cultural landscapes--History--Congresses.
Human ecology--History--Congresses.
Landscape architecture--History--Congresses.
Landscape design--History--Congresses.
Landscapes in art--Congresses.
Landscapes in literature--Congresses.
Landscapes--History--Congresses.
Princeton subject headings:
Cultural landscapes--History--Congresses.
Human ecology--History--Congresses.
Landscape architecture--History--Congresses.
Landscape design--History--Congresses.
Landscapes in art--Congresses.
Landscapes in literature--Congresses.
Landscapes--History--Congresses.