Columbia subject headings:
Illica, Luigi, 1857-1919.
Mascagni, Pietro, 1863-1945. Isabeu.
Opera--Italy--19th century.
Harvard subject headings:
Illica, Luigi, 1857-1919.
Mascagni, Pietro, 1863-1945. Isabeau.
Princeton subject headings:
Illica, Luigi, 1857-1919.
Mascagni, Pietro, 1863-1945. Isabeu.
Opera--Italy--19th century.