Columbia subject headings:
Composers--Italy--Biography.
Folk songs, Italian--Italy--Naples.
Librettists--Italy--Biography.
Singers--Italy--Biography.
Harvard subject headings:
Composers--Italy--Biography
Folk songs, Italian--Italy--Naples.
Librettists--Italy--Biography.
Popular music--Italy--Naples--History and criticism.
Singers--Italy--Biography
Songs--Italy--Naples--History and criticism.
Princeton subject headings: