Columbia subject headings:
Indy, Vincent d', 1851-1931. Fervaal.
Opera--France.
Wagner, Richard, 1813-1883.
Harvard subject headings:
Indy, Vincent d', 1851-1931. Fervaal.
Opera--France--19th century
Wagner, Richard, 1813-1883--Appreciation--France.
Princeton subject headings:
Indy, Vincent d', 1851-1931. Fervaal.
Opera--France--19th century.
Opera--France--20th century.
Wagner, Richard, 1813-1883--Appreciation--France.
Wagner, Richard, 1813-1883--Influence.