Columbia subject headings:
Allegory.
Langland, William, 1330?-1400? Piers Plowman.
Harvard subject headings:
Allegory.
Langland, William, 1330?-1400? Piers Plowman.
Princeton subject headings:
Allegory.
Christian poetry, English (Middle)--History and criticism.
Langland, William, 1330?-1400? Piers Plowman.