Columbia subject headings:
Art, Modern--20th century--Exhibitions.
Art--Private collections--Germany--Exhibitions.
Arte povera--Exhibitions.
Conceptual art--Exhibitions.
Earthworks (Art)--Exhibitions.
Marzona, Egidio--Art collections--Exhibitions.
Minimal art--Exhibitions.
Harvard subject headings:
Art, Modern--20th century--Exhibitions
Art--Private collections--Germany--Exhibitions
Conceptual art--Exhibitions.
Marzona, Egidio--Art collections--Exhibitions.
Minimal art--Exhibitions.
Princeton subject headings:
Art, Modern--20th century--Exhibitions.
Art--Private collections--Germany--Exhibitions.
Arte povera--Exhibitions.
Conceptual art--Exhibitions.
Earthworks (Art)--Exhibitions.
Marzona, Egidio--Art collections--Exhibitions.
Minimal art--Exhibitions.