Columbia subject headings:
Operas--Scores.
Harvard subject headings:
Alexander, the Great, 356 B.C.-323 B.C.--Drama.
Operas--Librettos
Operas--Scores
Princeton subject headings:
Alexander, the Great, 356 B.C.-323 B.C.--Drama.
Operas--Librettos.
Operas--Scores.
Operas.
Scores.