Columbia subject headings:
Art, Modern--20th century.
Beuys, Joseph--Criticism and interpretation.
Beuys, Joseph.
Burri, Alberto, 1915-1995--Criticism and interpretation.
Burri, Alberto, 1915-1995.
Harvard subject headings:
Beuys, Joseph
Buri, Alberto
Princeton subject headings:
Art, Modern--20th century.
Beuys, Joseph, 1921-1986--Criticism and interpretation.
Beuys, Joseph, 1921-1986.
Burri, Alberto, 1915-1995--Criticism and interpretation.
Burri, Alberto, 1915-1995.