Columbia subject headings:
Harvard subject headings:
Opera--Germany--Darmstadt--19th century.
Opera--Production and direction--Germany--Darmstadt--History--19th century.
Wagner, Richard, 1813-1883
Wagner, Richard, 1813-1883--Appreciation--Germany--Darmstadt.
Wagner, Richard, 1813-1883--Criticism and interpretation.
Princeton subject headings:
Opera--Germany--Bremen--19th century.
Opera--Germany--Bremen--20th century.
Wagner, Richard, 1813-1883--Influence--Germany--Bremen.
Wagner, Richard, 1813-1883--Performances--Germany--Bremen.