Columbia subject headings:
Music--Philosophy and aesthetics.
Wagner, Richard, 1813-1883--Criticism and interpretation.
Wagner, Richard, 1813-1883--Philosophy.
Harvard subject headings:
Music--Philosophy and aesthetics
Wagner, Richard, 1813-1883--Criticism and interpretation.
Wagner, Richard, 1813-1883--Philosophy.
Princeton subject headings:
Music--Philosophy and aesthetics.
Wagner, Richard, 1813-1883--Criticism and interpretation.
Wagner, Richard, 1813-1883--Philosophy.