Columbia subject headings:
Music in the theater.
Musical theater--History--19th century.
Harvard subject headings:
Essays.
Musical theater--France--Paris--19th century.
Musical theater--France--Paris--20th century.
Opera--France--Paris--19th century
Opera--France--Paris--20th century.
Princeton subject headings:
Essays.
Musical theater--France--Paris--19th century.
Musical theater--France--Paris--20th century.
Opera--France--Paris--19th century.
Opera--France--Paris--20th century.