Columbia subject headings:
Great Britain--Politics and government--To 1485.
Langland, William, 1330?-1400? Piers Plowman--Criticism and interpretation.
Langland, William, 1330?-1400?--Political and social views.
Harvard subject headings:
Authority in literature.
Great Britain--Politics and government--1377-1399.
Langland, William, 1330?-1400? Piers Plowman.
Politics in literature.
Princeton subject headings:
Authority in literature.
Great Britain--Politics and government--1377-1399.
Langland, William, 1330?-1400? Piers Plowman.
Politics in literature.