Columbia subject headings:
Ballads, English.
English poetry--Middle English, 1100-1500--History and criticism.
Folk songs, English.
Harvard subject headings:
Ballads, English--England--History and criticism
English poetry--Middle English, 1100-1500--History and criticism
Folk songs, English--England--History and criticism
Literature and folklore--England--History--To 1500.
Music and literature--History--To 1500.
Popular culture--England--History--To 1500.
Princeton subject headings:
English poetry--Middle English, 1100-1500--History and criticism.