Columbia subject headings:
Mutism in literature--Congresses.
Silence in literature--Congresses.
Speech errors in literature--Congresses.
Speech in literature--Congresses.
Harvard subject headings:
Literature--History and criticism--Congresses.
Rhetorical criticism--Congresses.
Silence in literature--Congresses.
Princeton subject headings:
Mutism in literature.
Silence in literature.
Speech errors in literature.
Speech in literature.