Columbia subject headings:
Harvard subject headings:
Drama--20th century--History and criticism
Drama--21st century--History and criticism.
German drama--20th century--History and criticism.
German drama--21st century--History and criticism.
Theater--Europe--History
Princeton subject headings:
European drama--Themes, motives.
German drama--20th century--History and criticism.
German drama--21st century--History and criticism.
Theater and society--Europe.
Theater--Political aspects--Europe.