Columbia subject headings:
Harvard subject headings:
Aesthetics, Modern--20th century.
Arts, Modern--20th century
Avant-garde (Aesthetics)
German literature--20th century--History and criticism
Italian literature--20th century--History and criticism
Princeton subject headings:
Avant-garde (Aesthetics)--Germany--History--Congresses.
Avant-garde (Aesthetics)--Italy--History--Congresses.