Columbia subject headings:
Harvard subject headings:
Classical drama--Appreciation--History--Congresses.
Classical drama--History and criticism--Theory, etc.--Congresses.
Criticism--Greece--History--Congresses.
Criticism--Rome--History--Congresses.
Princeton subject headings:
Classical drama--History and criticism--Theory, etc.
Criticism--Greece--History.
Criticism--Rome--History.
Humanists.