Columbia subject headings:
Strauss, Richard, 1864-1949. Operas.
Harvard subject headings:
Ballet
Opera
Strauss, Richard, 1864-1949. Ballets.
Strauss, Richard, 1864-1949. Operas.
Princeton subject headings:
Strauss, Richard, 1864-1949. Ballets.
Strauss, Richard, 1864-1949. Operas.