Columbia subject headings:
Harvard subject headings:
Arts, Modern--20th century--History.
Avant-garde (Aesthetics)--History--20th century.
Avant-garde (Aesthetics)--Political aspects--History--20th century.
Princeton subject headings:
Arts, Modern--20th century--History.
Avant-garde (Aesthetics)--History--20th century.
Avant-garde (Aesthetics)--Political aspects--History--20th century.