Columbia subject headings:
Art, Modern--20th century--Psychological aspects.
Art--Mutilation, defacement, etc.
Art--Mutilation, defacement, etc.--History.
Harvard subject headings:
Art, Modern--20th century--Psychological aspects.
Art--Mutilation, defacement, etc.
Art--Mutilation, defacement, etc.--History.
Princeton subject headings:
Art--Mutilation, defacement, etc.--History.
Art--Political aspects--History.
Iconoclasm.