Columbia subject headings:
Art, Modern--21st century--Exhibitions.
Earthworks (Art)--Italy--Fossombrone--Exhibitions.
Harvard subject headings:
Art, Modern--21st century--Exhibitions
Earthworks (Art)--Italy--Fossombrone--Exhibitions.
Princeton subject headings:
Art, Modern--21st century--Exhibitions.
Earthworks (Art)--Italy--Fossombrone--Exhibitions.