Columbia subject headings:
Donizetti, Gaetano, 1797-1848--Manuscripts--Facsimiles.
Operas--Scores.
Harvard subject headings:
Donizetti, Gaetano, 1797-1848--Manuscripts--Facsimiles.
Essex, Robert Devereux, Earl of, 1566-1601--Drama.
Music--Manuscripts--Facsimiles.
Operas--Scores
Princeton subject headings:
Donizetti, Gaetano, 1797-1848--Manuscripts--Facsimiles.
Music--Manuscripts--Facsimiles.
Operas--Scores.
Operas.
Scores.