Columbia subject headings:
Chaucer, Geoffrey, -1400--Sources.
English poetry--Middle English, 1100-1500--History and criticism.
Harvard subject headings:
Chaucer, Geoffrey, -1400--Sources.
English poetry--Middle English, 1100-1500--History and criticism
Princeton subject headings:
Chaucer, Geoffrey, -1400--Sources.
English poetry--Middle English, 1100-1500--History and criticism.