Columbia subject headings:
Experimental theater--Germany--History--Congresses.
Performing arts--Germany--History--Congresses.
Street theater--Germany--History--Congresses.
Theater and society--Germany--History--Congresses.
Harvard subject headings:
Experimental theater--Germany--History--Congresses.
Performing arts--Germany--History--Congresses.
Street theater--Germany--History--Congresses.
Theater and society--Germany--History--Congresses.
Princeton subject headings: