Columbia subject headings:
Langland, William, 1330?-1400? Piers Plowman.
Nature in literature.
Salvation in literature.
Harvard subject headings:
Langland, William, 1330?-1400? Piers Plowman.
Nature in literature.
Salvation in literature.
Princeton subject headings:
Langland, William, 1330?-1400? Piers Plowman.
Nature in literature.
Salvation in literature.