Columbia subject headings:
Ballet.
Opera.
Stravinsky, Igor, 1882-1971. Ballets.
Stravinsky, Igor, 1882-1971. Operas.
Harvard subject headings:
Ballet
Opera.
Stravinsky, Igor, 1882-1971. Ballets.
Stravinsky, Igor, 1882-1971. Operas.
Princeton subject headings:
Stravinsky, Igor, 1882-1971.