Columbia subject headings:
Wagner, Richard, 1813-1883--Criticism and interpretation--Congresses.
Women in music.
Women singers.
Harvard subject headings:
Wagner, Richard, 1813-1883--Congresses.
Wagner, Richard, 1813-1883--Criticism and interpretation--Congresses.
Women in music.
Women in opera.
Women singers.
Princeton subject headings:
Wagner, Richard, 1813-1883--Criticism and interpretation--Congresses.
Women in music.
Women singers.