Columbia subject headings:
Harvard subject headings:
George Arents Research Library--Catalogs.
Opera--Italy--19th century--Bibliography--Catalogs.
Operas--19th century--Librettos--Bibliography--Catalogs.
Princeton subject headings:
George Arents Research Library--Catalogs.
Opera, Italian--Bibliography--Catalogs.
Operas--Librettos--Bibliography--Catalogs.