Columbia subject headings:
Opera--Italy--Naples--20th century--Exhibitions.
Opera--Stage-setting and scenery--Italy--Naples--Exhibitions.
Harvard subject headings:
Opera--Italy--Naples--20th century--Exhibitions.
Opera--Stage-setting and scenery--Italy--Naples--Exhibitions.
Princeton subject headings:
Opera--Italy--Naples--20th century--Exhibitions.
Opera--Stage setting and scenery--Italy--Naples--Exhibitions.