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