Columbia subject headings:
Influence (Literary, artistic, etc.)
Keats, John, 1795-1821--Knowledge and learning.
Keats, John, 1795-1821--Sources.
Literature.
Shakespeare, William, 1564-1616--Influence.
Harvard subject headings:
Keats, John, 1795-1821--Criticism and interpretation.
Keats, John, 1795-1821--Influence--Shakespeare.
Shakespeare, William, 1564-1616--Influence--Keats.
Princeton subject headings: