Columbia subject headings:
Installations (Art)--United States--Exhibitions.
Irwin, Robert, 1928---Exhibitions.
Irwin, Robert, 1928---Sources.
Sculpture, American--20th century--Exhibitions.
Sculpture, American--Exhibitions.
Harvard subject headings:
Installations (Art)--United States--Exhibitions.
Irwin, Robert, 1928---Exhibitions.
Irwin, Robert, 1928---Sources.
Sculpture, American--Exhibitions.
Sculpture, Modern--20th century--United States--Exhibitions.
Princeton subject headings:
Irwin, Robert, 1928---Exhibitions.