Columbia subject headings:
Bayreuther Festspiele--History.
Wagner, Richard, 1813-1883--Criticism and interpretation--History--20th century.
Wagner, Richard, 1813-1883--Influence.
Harvard subject headings:
Bayreuther Festspiele--History--20th century.
Opera programs--Germany--Bayreuth--History--20th century.
Wagner, Richard, 1813-1883
Princeton subject headings:
Bayreuther Festspiele--History--20th century.
Opera programs--Germany--Bayreuth--History--20th century.
Wagner, Richard, 1813-1883.