Columbia subject headings:
Operas--Vocal scores with piano.
Harvard subject headings:
Macbeth, King of Scotland, active 11th century--Drama.
Operas
Operas--Vocal scores with piano
Vocal scores
Princeton subject headings:
Arrangements (Music)
Macbeth, King of Scotland, active 11th century--Drama.
Operas--Vocal scores with piano.
Operas.
Vocal scores.