Columbia subject headings:
Delphian oracle.
Plutarch. Moralia.
Harvard subject headings:
Oracles--Early works to 1800.
Plutarch--Criticism and interpretation.
Plutarch. De Pythiae oraculis.
Princeton subject headings:
Oracles--Early works to 1800.
Plutarch--Criticism and interpretation.
Plutarch. De Pythiae oraculis.