Columbia subject headings:
Chaucer, Geoffrey, -1400--Language.
English language--Middle English, 1100-1500--Tense.
Gower, John, 1325?-1408.
Harvard subject headings:
Chaucer, Geoffrey, -1400--Language.
English language--Middle English, 1100-1500--Tense.
Gower, John, 1325?-1408
Princeton subject headings:
Chaucer, Geoffrey, -1400--Language.
English language--Middle English, 1100-1500--Tense.
Gower, John, 1325?-1408.