Columbia subject headings:
Chaucer, Geoffrey, -1400--Language.
Chaucer, Geoffrey, -1400--Sources.
Harvard subject headings:
Chaucer, Geoffrey, -1400--Language.
Chaucer, Geoffrey, -1400--Sources.
Princeton subject headings:
Chaucer, Geoffrey, -1400--Language.
Chaucer, Geoffrey, -1400--Sources.