Columbia subject headings:
Musical theater--Germany--Munich--19th century--Congresses.
Wagner, Richard, 1813-1883--Congresses.
Wagner, Richard, 1813-1883. Ring des Nibelungen--Congresses.
Harvard subject headings:
Musical theater--Germany--Munich--19th century--Congresses.
Wagner, Richard, 1813-1883--Congresses.
Wagner, Richard, 1813-1883. Ring des Nibelungen--Congresses.
Princeton subject headings:
Musical theater--Germany--Munich--19th century--Congresses.
Wagner, Richard, 1813-1883--Congresses.
Wagner, Richard, 1813-1883. Ring des Nibelungen--Congresses.