Columbia subject headings:
Langland, William, 1330?-1400? Piers Plowman.
Harvard subject headings:
Christian poetry, English (Middle)--History and criticism
Langland, William, 1330?-1400? Piers Plowman.
Salvation in literature.
Salvation--Christianity--History of doctrines--Middle Ages, 600-1500
Princeton subject headings: