Columbia subject headings:
Adorno, Theodor W., 1903-1969.
Music--Philosophy and aesthetics.
Wagner, Richard, 1813-1883.
Harvard subject headings:
Adorno, Theodor W., 1903-1969
Music--Philosophy and aesthetics
Wagner, Richard, 1813-1883
Princeton subject headings:
Adorno, Theodor W., 1903-1969. Versuch über Wagner.
Wagner, Richard, 1813-1883.