Columbia subject headings:
Keats, John, 1795-1821--Criticism and interpretation.
Sonnet.
Harvard subject headings:
Keats, John, 1795-1821--Criticism and interpretation.
Keats, John, 1795-1821.
Sonnet.
Sonnets, English--History and criticism.
Princeton subject headings:
Keats, John, 1795-1821.
Sonnet.