Columbia subject headings:
Experimental theater--Germany--Congresses.
Street theater--Germany--Congresses.
Theater--Germany--Congresses.
Theater--Political aspects--Germany--Congresses.
Harvard subject headings:
Experimental theater--Germany--Congresses.
Street theater--Germany--Congresses.
Theater--Germany--Congresses.
Theater--Political aspects--Germany--Congresses.
Princeton subject headings:
Experimental theater--Germany--Congresses.
Street theater--Germany--Congresses.
Theater--Germany--Congresses.
Theater--Political aspects--Germany--Congresses.