Columbia subject headings:
Music--France--19th century--History and criticism.
Wagner, Richard, 1813-1883--Appreciation--France--Congresses.
Wagner, Richard, 1813-1883--Influence--Congresses.
Harvard subject headings:
Music--France--19th century--History and criticism--Congresses.
Wagner, Richard, 1813-1883--Appreciation--France--Congresses.
Wagner, Richard, 1813-1883--Influence--Congresses.
Princeton subject headings:
Music--Germany--19th century--History and criticism--Congresses.
Opera--Germany--19th century--Congresses.
Wagner, Richard, 1813-1883--Appreciation--France--Congresses.