Columbia subject headings:
Musical theater--Spain--History--19th century.
Musical theater--Spain--History--20th century.
Zarzuela--Spain.
Harvard subject headings:
Musical theater--Spain--History--19th century.
Musical theater--Spain--History--20th century.
Zarzuela--Spain.
Princeton subject headings:
Musical theater--Spain--History--19th century.
Musical theater--Spain--History--20th century.
Zarzuela--Spain.