Columbia subject headings:
Harvard subject headings:
Aesthetics--Congresses
Literature--History and criticism--Congresses.
Literature--Themes, motives--Congresses.
Silence (Philosophy)--Congresses.
Silence in literature--Congresses.
Silence--Cross-cultural studies--Congresses.
Silence--Political aspects--Congresses.
Silence--Social aspects--Congresses.
Princeton subject headings:
Literature--History and criticism--Congresses.
Silence in literature--Congresses.