Columbia subject headings:
Folk drama, German--History and criticism--Congresses.
German drama--20th century--History and criticism--Congresses.
Harvard subject headings:
Folk drama, German--History and criticism--Congresses.
German drama--20th century--History and criticism--Congresses.
Princeton subject headings:
Folk drama, German--History and criticism--Congresses.
German drama--History and criticism--20th century--Congresses.