Columbia subject headings:
Chaucer, Geoffrey, -1400--Language.
English language--Middle English, 1100-1500--Morphology.
English language--Middle English, 1100-1500--Phonology.
Harvard subject headings:
Chaucer, Geoffrey, -1400--Language.
English language--Middle English, 1100-1500--Morphology.
English language--Middle English, 1100-1500--Phonology
Princeton subject headings:
Chaucer, Geoffrey, -1400--Language.
English language--Middle English, 1100-1500--Morphology.
English language--Middle English, 1100-1500--Phonology.