Columbia subject headings:
English poetry--Middle English, 1100-1500--History and criticism.
English poetry--Scottish authors--History and criticism.
Poetics.
Harvard subject headings:
English poetry--Middle English, 1100-1500--History and criticism
English poetry--Scottish authors--History and criticism
Poetics--History--To 1500
Poetics.
Scottish poetry--To 1700--History and criticism.
Princeton subject headings:
English poetry--Middle English, 1100-1500--History and criticism.
Poetics.
Scottish poetry--To 1700--History and criticism.