Columbia subject headings:
English poetry--Middle English, 1100-1500--Authorship.
English poetry--Middle English, 1100-1500--History and criticism.
Harvard subject headings:
English poetry--Middle English, 1100-1500--Authorship.
English poetry--Middle English, 1100-1500--History and criticism
Gawain (Legendary character)--Romances--History and criticism.
Gawain and the Green Knight.
Princeton subject headings: