Columbia subject headings:
Harvard subject headings:
Monteverdi, Claudio, 1567-1643--Criticism and interpretation.
Musical criticism--History.
Opera--Philosophy and aesthetics.
Wagner, Richard, 1813-1883--Criticism and interpretation.
Princeton subject headings:
Monteverdi, Angelo, 1886-1967--Criticism and interpretation.
Musical criticism--History.
Opera--Philosophy and aesthetics.
Opera.
Wagner, Richard, 1813-1883--Criticism and interpretation.