Columbia subject headings:
Wagner, Cosima, 1837-1930--Drama.
Wagner, Richard, 1813-1883--In literature.
Harvard subject headings:
Wagner, Cosima, 1837-1930--Drama.
Wagner, Richard, 1813-1883--Drama.
Princeton subject headings:
Fiction.
Wagner, Cosima, 1837-1930--In literature.
Wagner, Richard, 1813-1883--In literature.