Columbia subject headings:
Drama--20th century--History and criticism.
Space and time in literature.
Theaters--Stage-setting and scenery.
Harvard subject headings:
German drama--21st century--History and criticism.
German drama--21st century--Stories, plots, etc.
Theater--History--21st century.
Theaters--Stage-setting and scenery
Princeton subject headings:
Drama--20th century--History and criticism.
Space and time in literature.
Theaters--Stage-setting and scenery.