Columbia subject headings:
English literature--Middle English, 1100-1500--History and criticism.
Harvard subject headings:
English literature--Middle English, 1100-1500--History and criticism
Gray, Douglas, 1930-2017
Gray, Douglas.
Princeton subject headings:
Civilization, Medieval, in literature.
English literature--Middle English, 1100-1500--History and criticism.
Fifteenth century.