Columbia subject headings:
Debussy, Claude, 1862-1918.
Wagner, Richard, 1813-1883--Criticism and interpretation.
Harvard subject headings:
Debussy, Claude, 1862-1918--Criticism and interpretation.
Wagner, Richard, 1813-1883--Criticism and interpretation.
Princeton subject headings:
Debussy, Claude, 1862-1918. Works.
Wagner, Richard, 1813-1883. Works.