Columbia subject headings:
Harvard subject headings:
Chaucer, Geoffrey, -1400--Symbolism--Congresses.
Semiotics and literature--Congresses.
Semiotics in literature--Congresses.
Symbolism in literature--Congresses.
Princeton subject headings:
Chaucer, Geoffrey, -1400--Allegory and symbolism--Congresses.
Symbolism in literature--Congresses.