Columbia subject headings:
Earthworks (Art)--Exhibitions.
Environment (Art)--Exhibitions.
Nature (Aesthetics)--Exhibitions.
Harvard subject headings:
Earthworks (Art)--Exhibitions.
Environment (Art)--Exhibitions.
Nature (Aesthetics)--Exhibitions
Princeton subject headings:
Ecology in art--Exhibitions.
Environment (Art)--Exhibitions.
Nature (Aesthetics)--Exhibitions.