Columbia subject headings:
Harvard subject headings:
European literature--19th century--History and criticism.
European literature--20th century--History and criticism.
Tragicomedy--19th century--History and criticism.
Tragicomedy--20th century--History and criticism.
Princeton subject headings:
European literature--19th century--History and criticism.
European literature--20th century--History and criticism.
Tragicomedy--19th century--History and criticism.
Tragicomedy--20th century--History and criticism.