Columbia subject headings:
Opera--Italy--19th century.
Puccini, Giacomo, 1858-1924--Criticism and interpretation.
Verismo (Opera)
Harvard subject headings:
Opera--Italy--19th century--History and criticism.
Puccini, Giacomo, 1858-1924--Criticism and interpretation.
Princeton subject headings:
Music--Social aspects--Italy.
Opera--Italy--19th century.
Opera--Italy--20th century.
Puccini, Giacomo, 1858-1924--Criticism and interpretation.
Realism in opera.