Columbia subject headings:
Arts, Modern--19th century.
Arts, Modern--20th century.
Avant-garde (Aesthetics)--History.
Harvard subject headings:
Art and society--History--19th century.
Art and society--History--20th century
Avant-garde (Aesthetics)--History--19th century.
Avant-garde (Aesthetics)--History--20th century.
Princeton subject headings:
Art and society--History--19th century.
Art and society--History--20th century.
Avant-garde (Aesthetics)--History--19th century.
Avant-garde (Aesthetics)--History--20th century.