Columbia subject headings:
Musical theater--Italy--Palermo--History--20th century.
Musical theater--Italy--Rome--History--20th century.
Theater--Italy--Palermo--History--20th century.
Theater--Italy--Rome--History--20th century.
Harvard subject headings:
Musical theater--Italy--Palermo--History--20th century.
Musical theater--Italy--Rome--History--20th century.
Theater--Italy--Palermo--History--20th century.
Theater--Italy--Rome--History--20th century.
Princeton subject headings:
Musical theater--Italy--Palermo--History--20th century.
Musical theater--Italy--Rome--History--20th century.
Theater--Italy--Palermo--History--20th century.
Theater--Italy--Rome--History--20th century.