Columbia subject headings:
Italian language--Study and teaching.
Italian language--Versification.
Libretto.
Music and language.
Opera--Italy.
Harvard subject headings:
Italian language--Diction.
Italian language--Pronunciation by foreign speakers.
Italian language--Versification
Libretto
Music and language
Opera--Italy.
Princeton subject headings:
Italian language--Study and teaching.
Italian language--Versification.
Libretto.
Music and language.
Opera--Italy.