Columbia subject headings:
Children's theater--Austria--Vienna--History--Congresses.
Children's theater--Social aspects--Austria--Vienna--Congresses.
Theater der Jugend (Vienna, Austria)--History--Congresses.
Harvard subject headings:
Children's theater--Austria--Vienna--History--Congresses.
Children's theater--Social aspects--Austria--Vienna--Congresses.
Theater der Jugend (Vienna, Austria)--History--Congresses.
Princeton subject headings:
Children's theater--Austria--Vienna--History--Congresses.
Children's theater--Social aspects--Austria--Vienna--Congresses.
Theater der Jugend (Vienna, Austria)--History--Congresses.