Columbia subject headings:
Plato--Criticism, Textual--Congresses.
Plato. Dialogues--Congresses.
Harvard subject headings:
Dialogues, Greek--History and criticism--Congresses.
Imaginary conversations--Congresses.
Plato--Congresses.
Princeton subject headings:
Plato--Criticism, Textual--Congresses.
Plato. Dialogues--Congresses.