Columbia subject headings:
Acting--History--Congresses.
German drama--Europe--History and criticism--Congresses.
Theater--Europe--History--Congresses.
Harvard subject headings:
Acting--History--Congresses.
German drama--Europe--History and criticism--Congresses.
Theater--Europe--History--Congresses.
Princeton subject headings:
Acting--History--Congresses.
German drama--Europe--History and criticism--Congresses.
Theater--Europe--History--Congresses.