Columbia subject headings:
German drama--18th century--History and criticism.
German drama--19th century--History and criticism.
German drama--20th century--History and criticism.
Harvard subject headings:
German drama--18th century--History and criticism.
German drama--19th century--History and criticism.
German drama--20th century--History and criticism.
Princeton subject headings:
German drama--18th century--History and criticism.
German drama--19th century--History and criticism.
German drama--20th century--History and criticism.